[Archive] The Shader Hole

[heavy blade]

GluaX my beloved

what does it even mean btw

what does it do

[timid pumice]

i don't understand why did they took away |, like, if you don't understand that's a bit operator you have the big stupid smh

oh

nvm it's okay

[heavy blade]

I don't understand why they didn't just make them use && and ||

[timid pumice]

maybe that's not something that would become a thing for realtime, but for scene artists, dude, that's gonna be nuts

[icy plume]

for gameplay I'd imagine something like faded cubemap transitions would go hard as fuck, the current rough cubemap transitions are so ugly

[snow cradle]

1 update per 5 frame

and no update on idle

[timid pumice]

Could you theorically increase quality overtime? Or is the RT always static

[timid pumice]

iirc that's how racing games does it, i personally don't mind and really helps with perfomance

[snow cradle]

u can set custom size (and rename rt or use retry)

[short dirge]

give weapon_cubemap;use weapon_cubemap?

....yeah, OK you are still just getting the render fleshed out first. I see the gun lose its reflection 1 second in

[snow cradle]

so i can't set it to $envmap on VertexLitShader. mb it needed custom shader. idk

[short dirge]

afaik there's no way to access vtf "faces" in gmod yet

[timid pumice]

Oh yeah definitely

[timid pumice]

I thought the issue was writting on them

[short dirge]

:(

[snow cradle]

so i just put rendertarget in $detail

[graceful lynx]

That's fuckin' cool

[misty surge]

Black magic!

[icy plume]

looks absolutely amazing!

[timid pumice]

we got gmod rtx before gta 6

[snow cradle]

using:

"$detail" "_rt_RealtimeScope"
"$detailblendmode" "4"
"$detailscale" "1"
"$detailblendfactor" "0.7"
"$envmap" ""

[snow cradle]

mirror in the car

[leaden wasp]

shii

[rain marten]

hmmm... Mirror... Car... Shaders........

[misty surge]

Bud did you check your mirrors? Someone almost cut you off.

[snow cradle]

non shader

[blissful laurel]

@snow cradle is there a reason your addons adding and removing hooks when toggling the postprocessing effect? i doubt constant hook with one "if" to disable the effect will affect performance so much, considering vanilla pp always did it like this

vanilla gmod does not have a hook order so all postprocessing effect order is randomized on launch, making it a pain to stack few effects, so i made my own tool that searches all hooks and removes them, adding one hook instead where i can change the order

your shaders making this thing incompatible as is, because it is constantly register and unregister hook on each toggle

another shader addon also registering and unregistering it's hooks on convar change hmmm

[finite quarry]

mine does it too

i don't see the problem

i don't want my addons taking up processing power if they're not doing anything, even if a very little amount of proc power

[calm root]

get it working before you macro-optimise lol

[finite quarry]

?

what am i missing

is my addon broken?

[calm root]

it will be with other shader addons/multiple according to that guy

[finite quarry]

really a non-problem, if one really wants a specific shader stacking order, all my shader effects have their own render functions in the render lib, it's as simple as making a new drawscreenspace hook and drawing them in the order you want

[blissful laurel]

no, but i would need to hook the hook.add function to be able to change the post processing order

as i said there is no such thing as hook order

from the wiki

[finite quarry]

and you misunderstood me, for my addon specifically, if you want any of the shaders in a specific order, it's as simple as

hook.Add("RenderScreenspaceEffects", "BlaBla", function()
  render.drawMercBlur(bla, bla)
  render.drawMercPosterize(bla)
  render.drawMercVignette(bla, bla)
end)

unspecific order is really only a problem if you're trying to do it with the post process tab

[blissful laurel]

yeah i checked the code but i would need to specifically add support for your addon, but i want to make a general system that works as is

[blissful laurel]

yeah and that's why i made hooks reorderable

[finite quarry]

Feel free to rewrite my addon if you really want it to support your thing. I don't feel like doing that.

All I'd ask for is credit

[snow cradle]

Optimization. You can write lua code the way you like.
Why should hooks be works if shader is disabled? They need to be removed.

[cosmic perch]

why not just use a hook lib with priorities instead

[blissful laurel]

wdym

[cosmic perch]

https://github.com/Srlion/Hook-Library

[blissful laurel]

from the vanilla code

hook.Add( "RenderScreenspaceEffects", "RenderColorModify", function()

    if ( !pp_colormod:GetBool() ) then return end
    if ( !GAMEMODE:PostProcessPermitted( "color mod" ) ) then return end

    local tab = {}

    tab[ "$pp_colour_addr" ] = pp_colormod_addr:GetFloat() * 0.02
    tab[ "$pp_colour_addg" ] = pp_colormod_addg:GetFloat() * 0.02
    tab[ "$pp_colour_addb" ] = pp_colormod_addb:GetFloat() * 0.02
    tab[ "$pp_colour_brightness" ] = pp_colormod_brightness:GetFloat()
    tab[ "$pp_colour_contrast" ] = pp_colormod_contrast:GetFloat()
    tab[ "$pp_colour_colour" ] = pp_colormod_color:GetFloat()
    tab[ "$pp_colour_mulr" ] = pp_colormod_mulr:GetFloat() * 0.1
    tab[ "$pp_colour_mulg" ] = pp_colormod_mulg:GetFloat() * 0.1
    tab[ "$pp_colour_mulb" ] = pp_colormod_mulb:GetFloat() * 0.1
    tab[ "$pp_colour_inv" ] = pp_colormod_inv:GetFloat()

    DrawColorModify( tab )

end )
```|
https://github.com/Facepunch/garrysmod/blob/dfdafba0f04e75be122961291a56d9c1714a3d8a/garrysmod/lua/postprocess/color_modify.lua#L35

[blissful laurel]

can hooks be reordered after they have been applied?

[cosmic perch]

yes, just supply the same stuff but with a diff priority

maybe at some point i can make it easier to change priority without having to supply the function

[blissful laurel]

i don't think using a hook library necessary for my usecase, since i unhook everything related to RenderScreenspaceEffects and run functions manually with the order i provide

function ppframework.initialize()
    local hooks = hook.GetTable().RenderScreenspaceEffects
    if not hooks then
        return error "No hooks were present"
    end
    local index = 0
    for name, func in pairs(hooks) do
        hook.Remove("RenderScreenspaceEffects", name)
        ppframework.pplist[name] = func
        index = index+1
        ppframework.order[index] = name
    end
    hook.Add("RenderScreenspaceEffects", "ppframework.applypostprocess", ppframework.applypostprocess)
    CreateClientConVar("pp_use_render_screen_quad", "1", false, false)
    CreateClientConVar("pp_debug_drawname", "0", false, false)
    ppframework.initialized = true
end

function ppframework.applypostprocess()
    for key, name in ipairs(ppframework.order) do
        ppframework.pplist[name]()
    end
end

[snow cradle]

so?

[snow cradle]

You're crap up the client's game

setup sbox gamemode:
100 addons + 100 hooks + 100 if = bad
100 addons + 0 hooks = good

use 1-2-3 shader = + 1-2-3 hooks = nice

[blissful laurel]

i see where you coming at, but i don't think even a 100 ifs would take longer than 0.01ms

[snow cradle]

Why spoil optimization for no reason. When it can be avoided

[blissful laurel]

https://softwareengineering.stackexchange.com/questions/80084/is-premature-optimization-really-the-root-of-all-evil

[snow cradle]

@blissful laurel If you want, write the lua code the way you like. I don't see the point in reworking addons because you decided that hook.Remove isn't worth using.

[blissful laurel]

i just asked is there any specific reason lol

[snow cradle]

I already named the reason

[blissful laurel]

you asked questions and i tried to answer, that's it

and i heard you

[blissful laurel]

porting my old shader i made for sbox

it also looks pretty when applied on ui

[graceful lynx]

That's a weird effect

Hard to mentally accept that it's an in-game screenshot

[blissful laurel]

that supposed to be something like VHS but turned out more like general composite video effect, for simplicity i still call it VHS

[graceful lynx]

Got a real "Don't do drugs" PSA vibe to it

[shadow shuttle]

oh very pretty

[calm root]

You could detour hook.Add/Remove to detect the new ones, bit of a cludge but it'd work for those dynamic hooks

[blissful laurel]

yeah i already said that before

[wispy birch]

cause not standard

[zenith bear]

That looks very identical to a VHS tape look, would love to use it if you are going to release it at some point

I've been looking to recreate that very video composite effect to my VHS effect but I've only used Lua for this, shaders are still new to me and I haven't looked into them that much yet.

[blissful laurel]

i plan to release it as soon as i recover glitch effect (snowflakes) and my postprocessing framework would be somewhat ready

maybe even optimize it a bit since this effect is entirely one pass (e. g. this means blur 4 times more expensive)

only upside of doing one pass is that way shader should work using r_screenoverlay on any source game

[blissful laurel]

funnily enough this shader have 0 impact on my fps lol

[snow cradle]

real time rt scope update: viewid = 3

[shadow shuttle]

what is an rt scope

[neat terrace]

render target scope, typically the picture-in-picture thing you see in swep packs

[shadow shuttle]

but if ive seen them in swep packs do they not already exist

[misty surge]

Not always, default source engine uses cubemaps

[snow cradle]

test shadow mapping ft. @keen coral

[snow cradle]

alpha channel support for all models (rt worldpos, worldnormals, depth buffer)

[timid pumice]

Anyone did UI shaders or 2d shaders based on screenspace + sectors?

[misty surge]

Yes, I just remember someone making one for circles, rounded UI, I may have forgot who did.

[timid pumice]

ethan plox, i'm trying so hard to get your shader compiling tool working

HOLY CRAP I FINALLY MANAGED TO MAKE IT WORK

[timid pumice]

@misty surge just to make sure, we cannot build with ps_3 right? I just hit the max instructions (Tried to do a loop)

[misty surge]

It should support 3.0 correctly, 2.0 as well. It depends on the name of the file itself

Then I added a txt file with a number to append a new shader each time.

Reset the material and gmod does the rest

It’s not perfect but when it works, it’s basically the only way I can test quickly between each update.

[misty surge]

The name I forgot is @cosmic perch

[shadow shuttle]

Lol Evgeny is doing everything

[cosmic perch]

roar

[sacred jackal]

can you pass in a rt as a texture in a shader? Left is what i render in the rt, right is a shader thats just returning the texture, and thats black

[snow cradle]

try to use $texture1, remove fix_fb and flags in .vmt

[snow cradle]

⭐⭐⭐⭐⭐

[snow cradle]

Sample to use MRT (Multiple Render Targets) using SetRenderTargetEx.
Thanks @hollow pollen
MRT sample in GWater: https://github.com/meetric1/gwater2/blob/40e0935100face4c26ea77071d8a089710c8c109/lua/gwater2_shaders.lua#L128

Other sample:

local normals = GetRenderTarget("normals", ScrW(), ScrH())
local worldpos = GetRenderTarget("worldpos", ScrW(), ScrH())
local depthWriteMat = Material("pp/worldpos_depth")

hook.Add("RenderScene", "MRT", function()
    cam.Start3D( vector_origin, EyeAngles() )
    cam.IgnoreZ(true)
    render.SetMaterial(depthWriteMat)

    render.PushRenderTarget(normals)
        render.SetRenderTargetEx(1, worldpos)
        render.ClearDepth()
            min,max = game.GetWorld():GetModelBounds()
            render.DrawBox( vector_origin, angle_zero, max*5, min*5, color_white )
        render.PopRenderTarget()
    render.SetRenderTargetEx(1, nil)
    cam.IgnoreZ(false)
    cam.End3D()
end)

//pixel shader
struct PS_OUTPUT
{
    float depth         : SV_Depth; //just render order fix
    float4 normals         : COLOR0;
    float4 worldpos     : COLOR1;
};

#define znear float(Constants0.x)
#define zfar float(Constants0.y)

PS_OUTPUT main( PS_INPUT i )
{
    PS_OUTPUT o = ( PS_OUTPUT )0;

    float depth = i.vWorldPos_projPosZ.w;
    float p = LinearToGamma(1/depth);
    float3 worldpos = i.vWorldPos_projPosZ.xyz;

    o.normals = float4(i.Normals,1);
    o.worldpos = float4(worldpos,p);

    float final_depth = (1/depth - 1/znear)/(1/zfar - 1/znear);
    o.depth = final_depth;

    return o;
};

so it 100% works using render.SetMaterial
But I'm not sure about the rest:

    render.WorldMaterialOverride( depthWriteMat )
    render.BrushMaterialOverride( depthWriteMat )
    render.ModelMaterialOverride( depthWriteMat )
    render.MaterialOverride( depthWriteMat )

[snow cradle]

Second sample with models:

local rt_test_mrt1 = GetRenderTarget("worldnormals", ScrW(), ScrH())
local rt_test_mrt2 = GetRenderTarget("worldpos", ScrW(), ScrH())
local depthWriteMat = Material("pp/worldpos_depth")

local hookName = "MRT"
RunConsoleCommand("r_PhysPropStaticLighting", "0")


hook.Add("PreRender", hookName, function()
    render.PushRenderTarget(rt_test_mrt1)
        render.Clear(0,0,0,0)
    render.PopRenderTarget()

    render.PushRenderTarget(rt_test_mrt2)
        render.Clear(0,0,0,0)
    render.PopRenderTarget()
end)

hook.Add("PostDrawTranslucentRenderables", hookName, function()
    render.ModelMaterialOverride( depthWriteMat )

    render.PushRenderTarget(rt_test_mrt1)
        render.ClearDepth()
        render.SetRenderTargetEx(1, rt_test_mrt2)

        render.OverrideDepthEnable(true, true)
        for k,v in pairs(ents.FindByClass("prop_physics")) do
            v:DrawModel()
        end
        render.OverrideDepthEnable(false, false)

    render.PopRenderTarget()
    render.SetRenderTargetEx(1, nil)

    local view = render.GetViewSetup( true )
    local znear = view.znear
    local zfar = view.zfar

    depthWriteMat:SetFloat("$c0_x", znear) 
    depthWriteMat:SetFloat("$c0_y", zfar)
end)

hook.Add("HUDPaint", hookName, function()
    render.DrawTextureToScreenRect(rt_test_mrt1, ScrW()-ScrW()/2,0, ScrW()/2, ScrH()/2)
    render.DrawTextureToScreenRect(rt_test_mrt2,  ScrW()-ScrW()/2,ScrH()/2, ScrW()/2, ScrH()/2)
end)

Third sample MRT (render.RenderView)

local rt_test_mrt1 = GetRenderTarget("worldnormals", ScrW(), ScrH())
local rt_test_mrt2 = GetRenderTarget("worldpos", ScrW(), ScrH())
local depthWriteMat = Material("pp/worldpos_depth")

local hookName = "MRT"
RunConsoleCommand("r_PhysPropStaticLighting", "0")

hook.Add("PreRender", hookName, function()
    render.ModelMaterialOverride( depthWriteMat )
    render.WorldMaterialOverride( depthWriteMat )
    render.BrushMaterialOverride( depthWriteMat )

    render.PushRenderTarget(rt_test_mrt1)
        render.Clear(0,0,0,0)
        render.ClearDepth()
        render.SetRenderTargetEx(1, rt_test_mrt2)

        render.OverrideDepthEnable(true, true)
        render.RenderView()
        render.OverrideDepthEnable(false, false)

    render.PopRenderTarget()
    render.SetRenderTargetEx(1, nil)

    local view = render.GetViewSetup( true )
    local znear = view.znear
    local zfar = view.zfar

    render.ModelMaterialOverride()
    render.WorldMaterialOverride()
    render.BrushMaterialOverride()

    depthWriteMat:SetFloat("$c0_x", znear) 
    depthWriteMat:SetFloat("$c0_y", zfar)
end)

hook.Add("PreDrawOpaqueRenderables", hookName, function()
    local rt = render.GetRenderTarget()

    if rt and rt:GetName() == "worldnormals" then
        render.PushRenderTarget(rt_test_mrt2)
            render.Clear(0,0,0,0)
        render.PopRenderTarget()
        render.SetRenderTargetEx(1, rt_test_mrt2)
    end
end)


hook.Add("HUDPaint", hookName, function()
    render.DrawTextureToScreenRect(rt_test_mrt1, ScrW()-ScrW()/2,0, ScrW()/2, ScrH()/2)
    render.DrawTextureToScreenRect(rt_test_mrt2,  ScrW()-ScrW()/2,ScrH()/2, ScrW()/2, ScrH()/2)
end)

[snow cradle]

so i will make rt with tangets

and other

• worldpos + depth
• worldnormals
• world tangets

[snow cradle]

MRT bug #1:

MRT with render.WorldMaterialOverride( depthWriteMat ) works only with brushes maked on screenspace_general shader

MRT bug #2:

Use this or the game will crash

hook.Add("InitPostEntity", hookName, function()
    timer.Simple(1, function()
        InitMRT()
    end)
end)

[snow cradle]

fixed bug#1 and bug#2

so i make like that:

local function WriteMRT(rt_index, rt_texture)
  local rt = render.GetRenderTarget()

  if rt and rt:GetName() == "_rt_normals" then
    render.SetRenderTargetEx(rt_index, rt_texture)
  end
end

hook.Add("PreDrawOpaqueRenderables", hookName, function() --add models (and screen space general brushes)
  WriteMRT(1, rt_worldpos)
end)

hook.Add("PreDrawSkyBox", hookName, function() --add brushes (lighmappedgeneric)
  WriteMRT(1, rt_worldpos)
end)

hook.Add("PreDrawViewModel", hookName, function() --add weapon
  WriteMRT(1, rt_worldpos)
end)

[snow cradle]

MRT from Parallax Mapping

[snow cradle]

MRT worldpos + worldnormals + bumps&height from Parallax brush shader (once every two frames)

some ghosting

[snow cradle]

so we can use MRT from world without RenderView

hook.Add("PreDrawOpaqueRenderables", hookName, function() --модели и браши screenspace_general
    if !bDepthPass then
        render.SetRenderTargetEx(1, rt_parallaxheight)
    end

    WriteMRT(1, rt_worldpos)
end)

[snow cradle]

+- fixed weapon depth

local view_tbl = {
  viewid = 7,
  drawviewmodel = true,
  drawviewer = false,
  znearviewmodel = 15,
  zfarviewmodel = 1000,
  bloomtone = false,
}

hook.Add("PreDrawViewModel", hookName, function(vm,ply,weapon)
  if bDepthPass then
    cam.IgnoreZ(true)
    WriteMRT(1, rt_worldpos)
    cam.IgnoreZ(false)
  end
end)

using PreRender->PostRender fix bugs with delay of weapon

[neat terrace]

capturing every part of the frame rendered?

what's the point of the bottom rt? the one with the colored quadrants

[snow cradle]

bottom rt - worldPosition(+depth buffer .a channel) it needed for:

• Screen Space Reflections
• Screen Space Shadows
• Screen Space Global Illumination
• Screen Space Shadows
  ...etc

[snow cradle]

wut

[snow cradle]

i make 1 RenderView and get 2 RenderTartgets using MRT (worldnormals, worldpos + depth buffer, + next rt: world tangents)

Multi render target is a very cool thing, allowing you to get a lot of things with a small amount of rendering.

Also, some RT output does not require additional rendering.

(normals + height from parallax brushes)

[snow cradle]

$translucent 0

[bitter oriole]

@snow cradle Could you put all this on a github repo like how ficool does with his examples?

[snow cradle]

Yes. Once I test everything, I'll make a repository.

[bitter oriole]

Awesome

[snow cradle]

some props are not rendering. so idk how to fix

and if props is spawned it will works

[snow cradle]

this is static props. map - Construct remaster
https://steamcommunity.com/sharedfiles/filedetails/?id=3334581973&searchtext=

RunConsoleCommand("r_PhysPropStaticLighting", "0") not helps

[nocturne patio]

I finally found that using cam.Start3D2D and cam.End3D2D causes the incorrect render order in render.RenderView (left one: enabled the hook below, right one: without the hook).

One of my SENTs (Decent Vehicle Taxi Station) was using this to display their name and I didn't notice that it was the cause.

hook.Add( "PostDrawOpaqueRenderables", "Using 3D2D", function()
    cam.Start3D2D(Vector(), Angle(), 5)
    draw.SimpleText("Something", "DermaLarge", 0, 0)
    cam.End3D2D()
end )

[wispy birch]

this is not invalid render order
thats the depth buffer being fucked up

[nocturne patio]

is there any way to fix this? I tried render.OverrideDepthEnable(true, false) around the 3D2D operation but it didn't help.

[snow cradle]

--code (ur hook with renderview)
bDrawCustom = true
render.RenderView()
bDrawCustom = false

hook.Add( "PostDrawOpaqueRenderables", "Using 3D2D", function()
if bDrawCustom then return end -- new line
    cam.Start3D2D(Vector(), Angle(), 5)
    draw.SimpleText("Something", "DermaLarge", 0, 0)
    cam.End3D2D()
end )

[heavy blade]

wouldn't it be better to use vector_origin and angle_zero for that?

[snow cradle]

so this is sample for drawing text on car @heavy blade

just blank

[heavy blade]

I know, I'm just saying using Vector() and Angle() still creates a new object, which uses the default 0, 0, 0 values

[snow cradle]

yea its better

[heavy blade]

but vector_origin and angle_zero are globalized, so these could just be used

[snow cradle]

but @nocturne patio use it like
car:GetPos() and car:GetAngles() mb

just placeholder

nevermind

[nocturne patio]

Yes, I think it would be better to use them, too, but I like to use Angle() and Vector() for prototyping as they are slightly shorter than angle_zero and vector_origin.

[livid cliff]

local vZero = Vector()
local aZero = Angle()

[nocturne patio]

local v = Vector()
local a = Angle()

[nocturne patio]

thank you 😎

[snow cradle]

do u render ur custom shader to world?

using renderview

[nocturne patio]

I use another render target to render the view like this

render.PushRenderTarget(anotherRT)
render.WorldMaterialOverride(mat)
render.ModelMaterialOverride(mat)
render.MaterialOverride(mat)
render.BrushMaterialOverride(mat)
bRenderingRenderView = true
render.RenderView { drawviewmodel = true }
bRenderingRenderView = false
render.WorldMaterialOverride()
render.ModelMaterialOverride()
render.MaterialOverride()
render.BrushMaterialOverride()
render.PopRenderTarget()

then I draw the render target to the screen (both of them run in HUDPaint)

ppcopy:SetTexture("$basetexture", anotherRT)
surface.SetDrawColor( 255, 255, 255, 255 )
surface.SetMaterial(ppcopy)
surface.DrawTexturedRect(32, 32, 1280, 720)

[snow cradle]

so mat is screen space shader?

[nocturne patio]

yes

[snow cradle]

can u pls test this map

#1324464901401477191 message

and this bug #1324464901401477191 message

using ur shader

[nocturne patio]

it seems everything is drawing fine. I'm setting $flags2 to 510 (forgot the reason, though).

[snow cradle]

lol

can u share vertex shader pls

[nocturne patio]

alright, it contains some garbage but I'm using this

const float4x4 cModelViewProj : register(c4);
const float4x4 cViewProj : register(c8);
const float4 cModelViewProjZ : register(c12);
const float4 cViewProjZ : register(c13);
struct VS_INPUT {
    float4 pos    : POSITION0;
    float4 normal : NORMAL0;
    float2 uv     : TEXCOORD0;
    float2 uv2    : TEXCOORD1;
    float2 uv3    : TEXCOORD2;
    float4 tangent : TANGENT0;
    float4 binormal : BINORMAL0;
};
struct VS_OUTPUT {
    float4 projPos : POSITION;
    float2 uv      : TEXCOORD0;
    float2 uv2     : TEXCOORD1;
    float2 uv3     : TEXCOORD2;
    float4 depth   : TEXCOORD3;
    float4 normal  : TEXCOORD4;
    float4 pos     : TEXCOORD5;
};
VS_OUTPUT main( const VS_INPUT v ) {
    VS_OUTPUT output;
    output.projPos = mul( v.pos, cViewProj );
    output.uv = v.uv.xy;
    output.uv2 = v.uv2.xy;
    output.uv3 = v.uv3.xy;
    output.depth = output.projPos;
    output.normal = abs(v.normal);
    output.pos = v.pos;
    output.pos.w = dot(v.pos, cViewProjZ);
    return output;
}

and the pixel shader is like this

struct PS_INPUT {
    float2 pos    : VPOS;
    float2 uv     : TEXCOORD0;
    float2 uv2    : TEXCOORD1;
    float2 uv3    : TEXCOORD2;
    float4 depth  : TEXCOORD3;
    float4 normal : TEXCOORD4;
    float4 vpos   : TEXCOORD5;
    float  face   : VFACE;
};
struct PS_OUTPUT {
    float  depth : SV_Depth;
    float4 color : COLOR0;
};
const float4 c0 : register( c0 );
PS_OUTPUT main( const PS_INPUT i ) {
    PS_OUTPUT output;
    float depth = i.vpos.w;
    float p = 1 / depth - 1;
    float3 worldPos = i.vpos.xyz;
    output.depth = (depth - c0.x) / (c0.y - c0.x);
    output.color.w = 1 - output.depth;
    output.color.xyz = output.depth;
    return output;
}

[leaden mesa]

is the 3d skybox supposed to be doing that?

rendering as "close" in the depth buffer

[nocturne patio]

I didn't notice that but I think it's supposed to be because I think they are drawn in different rendering passes

[snow cradle]

what is 510 flag2? xd

256+128+64+32+16+8+7?

oh! 511 xdxdxdxdx

[nocturne patio]

basically it is something like 256 + 128 + 64 + 32 + 16 + 8 + 7 but I'm referring this instead of Valve Developer Community https://github.com/SourceSDK2013Ports/csgo-src/blob/main/src/public/materialsystem/imaterial.h#L402

interesting thing is the lowest bit seems to be unused

// UNUSED = (1 << 0),

[snow cradle]

also does u write flags2 as:
$flags2 510
or like:

$test_flags2 510 
Proxies
    {
        Equals {
            srcVar1    $test_flags2
            resultVar    $flags2
        }
    }

[nocturne patio]

I'm using the latter one

[snow cradle]

ok thanks

https://tenor.com/view/ehehe-laughing-cat-cat-laughing-silly-cat-gif-16961599182308150028

yea it works. also this flags fix that crutch: RunConsoleCommand("r_PhysPropStaticLighting", "0")

@nocturne patio

[snow cradle]

u have nice formula of depth!
depth = (depth - c0.x) / (c0.y - c0.x);

1 screen ur
2 screen my - (1/depth - 1/znear)/(1/zfar - 1/znear);

here some little bug

but that better

then my

ah sorry that ok

i just make +5 znear. i will remove it

🔥🔥🔥

[neat terrace]

local COL_SET =     Color(0, 196, 0)
local COL_UNSET =   Color(196, 0, 0)

local function FindFlags(inp, enum_name)
    if not isnumber(inp) then return end
    if not isstring(enum_name) then return end
    if #enum_name:Trim() == 0 then return end

    local ENUM = {}
    local largest = 0

    local pattern = string.format("^%s_", string.PatternSafe(enum_name))

    -- populate enum field
    for k,v in next, _G do
        if not isstring(k) then continue end
        if not isnumber(v) then continue end
        if not k:find(pattern) then continue end

        ENUM[k] = v
        ENUM[v] = k

        if v > largest then
            largest = v
        end
    end

    local bits = math.ceil(math.log(largest) / math.log(2))

    -- iterate over enum, checking if our input has the flags
    for i = 0, bits do
        local val = bit.lshift(1, i)

        if bit.band(inp, val) == val then
            MsgC(COL_SET, "█\t")
            print("SET", val, ENUM[val])
        else
            MsgC(COL_UNSET, "█\t")
            print("UNSET", val, ENUM[val])
        end
    end
end

FindFlags(bit.bor(IN_ATTACK, IN_ATTACK2, IN_RELOAD, IN_JUMP), "IN")

for future reference if you find yourself asking the same question

requires the enum to exist in _G for it to work though, but you should be able to define them before checking :D

[snow cradle]

thanks!

[nocturne patio]

I learned it from a Japanese article that explains how to write Z-buffer (depth value) http://marupeke296.com/DXG_No43_ZBufferTexture.html
It says depth = (cModelViewProj * vertexPos).z / (cModelViewProj * vertexPos).w is the easiest, but I don't test it yet.

[snow cradle]

😳😳😳

[snow cradle]

This would be better since we don't use 2 registers in vmt

[snow cradle]

so this is like float depth = vProjPos.z/vProjPos.w;?

[nocturne patio]

yes

[snow cradle]

so using cViewProj or cModelViewProj = same result

depth = (depth - c0.x) / (c0.y - c0.x); best formule

[nocturne patio]

it seems depth = vProjPos.z / zFar does the same job

[snow cradle]

--ARC9 SUPPORT
local arc9 = weapons.GetStored( "arc9_base" )
ARC9_PreDrawViewModel = ARC9_PreDrawViewModel or arc9.PreDrawViewModel

arc9.PreDrawViewModel = function(self)
    ARC9_PreDrawViewModel(self)
    WriteMRT(1, rt_worldpos)
end

[snow cradle]

yea here bug with 3d skybox

[snow cradle]

3D Skybox Depth fix

//pixel shader
#define skybox_scale float(Constants0.z)


//code
float final_skybox_scale = 1/skybox_scale;
float p = LinearToGamma(1/depth / final_skybox_scale);

local function SetMatSkyboxScale(scale)
    depthWriteMat:SetFloat("$c0_z",1 ) 
    depthWriteMat_sky:SetFloat("$c0_z",scale ) 
end

hook.Add("SetupSkyboxFog", "MRT", function(scale)
  SetMatSkyboxScale(scale)
  hook.Remove("SetupSkyboxFog", "MRT")
end)

[snow cradle]

shared

[graceful lynx]

It wouldn't work in Garry's Mod without an external DLL, but I wonder if—in general—a technique like DLSS could be applied to shadow maps

[keen coral]

what wouldn't work?

[hollow arrow]

Why couldnt it work without dll ?

[graceful lynx]

If you feel like implementing AI-based image upscaling in pure lua, go right ahead

[keen coral]

oh, so that's what you're talking about, lol

[graceful lynx]

What did you think I meant?

[timid pumice]

Wow cool your beans pipi we are all homies and goldermor

[graceful lynx]

I don't think anyone was arguing there. I certainly wasn't

[short dirge]

This can be usually seen as instigative tone of voice. I would usually just pass it off as a “yeah [, that’s right/ that’s what I meant]”
Or simply shrug off the condescension from gold.
Hope this helps

(I see this happen in too many dev communities)

[graceful lynx]

I can understand why that could be the assumed tone, but it was a sincere question

From my perspective, that would have been a very strange point in the conversation for me to be upset or argumentative.
It was a simple misunderstanding that I want to understand the cause of so I can avoid it in the future

[wispy birch]

nah its okay, maybe it looked possibly a little rude, but people really dont have to assume that here

[snow cradle]

https://tenor.com/view/panda-cute-its-mine-adorable-ball-gif-17009270

[graceful lynx]

(I have no idea what this type of image is intending to show me)

[snow cradle]

worldnormals
1/worldpos
mask for stencil (for alpha test support)

[sacred jackal]

can you compile shaders on macos?

nvm, stupid question

[snow cradle]

💀💀💀💀

[snow cradle]

void SetLIGHTING_PREVIEW( int i ) can make output wp&wn from LightMapped and VertexLitGeneric using MRT:

struct LPREVIEW_PS_OUT
{
    float4 color : COLOR0;
    float4 normal : COLOR1;
    float4 position : COLOR2;
    float4 flags : COLOR3;
};

but idk how to enable lighting preview

how to add alpha test suppot to screen space general?

[snow cradle]

$ALPHABLEND 1

[misty surge]

That worked??

[snow cradle]

no

i use own shaders for models and brushes

and make MRT

worldpos worldnormals

[snow cradle]

Stencil is bad idea thats whay he not works with MRT

and it need 2 RenderView's

so MRT not needed RenderViews

0

[snow cradle]

so idk but depth fix works on models only using render.OverrideDepthEnable(true, true)

brushes ok

models not ok

[snow cradle]

SSAO

[heavy blade]

!IsValid(ENT_SKY_CAMERA)

[snow cradle]

IsValid not needed

[heavy blade]

it is recommended for entities

use it

[snow cradle]

thanks. no

[cosmic perch]

IsValid is only needed if u dont know if its gonna be valid or not, hes sure that its valid, so he only checks if the value itself been set or not, not checking the entity state

[heavy blade]

what if it's removed after that?

[cosmic perch]

it wont

[heavy blade]

you never know what devs can do, I don't really know what he's doing, but if it really relies on that entity existing, then IsValid would be better

[snow cradle]

Have you ever deleted the sky_camera entity?

[cosmic perch]

ofc it relies on it existing, just telling u why he doesnt use isvalid lol

[heavy blade]

me no, a friend of mine has tho

[cosmic perch]

he basically gives no shit if it breaks if that entity doesnt exist, because at that time, he doesnt care about the person who removes it

simple as that

[heavy blade]

LMAO

fairs honestly, LOL

[snow cradle]

Don't forget to put an IsValid check on game.GetWorld() when you use this function. Otherwise, you never know, this entity will be deleted.

[heavy blade]

that CANNOT be deleted.. right?

fuck it I wanna try

yep, you cannot delete it

[neat terrace]

you used to be able to

[snow cradle]

Can i make Treesway on pixel shader?

https://github.com/ValveSoftware/source-sdk-2013/blob/0565403b153dfcde602f6f58d8f4d13483696a13/src/materialsystem/stdshaders/tree_sway.h#L23

[neat terrace]

large maybe

[snow cradle]

Usually, it is done in the vertex shader. But I can't input variables into the vertex shader to make the threesway work.

Therefore, the only option left is to make it in a pixel shader.

[snow cradle]

So. I can only do something similar to transform textures in pixel shader

Trysway should change worldpos before this line:
float4 vProjPos = mul( float4( worldPos, 1 ), cViewProj );

To make a basic three-way, the vertex shader must have a time parameter.

There's a problem with this

[snow cradle]

mb i can write some data using cam.PushModelMatrix in vertex shader

[nocturne patio]

I could convey a scalar value using render.FogStart(0) and render.FogEnd(value) (the vertex shader does input.position + input.normal * the value in this video)

[snow cradle]

this?

//common_vs_fxc.h
const float4 cFogParams                    : register(c16);
#define cFogEndOverFogRange cFogParams.x
#define cFogOne cFogParams.y
#define cFogMaxDensity cFogParams.z
#define cOOFogRange cFogParams.w

[nocturne patio]

Yes, the cOOFogRange seems to be "one over fog range" which is 1 / (FogEnd - FogStart)

[snow cradle]

basetexturetransform and shadows

[shadow shuttle]

im out of the loop what are these videos showing really?

[snow cradle]

Shadows support the movement of leaves

[snow cradle]

The model matrix of the models is standard and does not have data on the rotation of the model.

$VERTEXTRANSFORM 1 does not help

[snow cradle]

Perhaps the MATERIAL_VAR2_SUPPORTS_HW_SKINNING flag would make the model matrix work, but when it is set, the game crashes

[snow cradle]

it should works like that (gmod with EGSM)

[snow cradle]

and this: screenspace_general

//vertex
struct VS_OUTPUT
{
    //code
    float4x3 Model                 : TEXCOORD0;
};

//code
o.Model = cModel[0];

//pixel
struct PS_IN
{
        //code
    float4x4 Model                 : TEXCOORD0;
};

//code
Out.color = float4(Model[0].xyz,1);

[snow cradle]

I checked the data of some cModel matrices:
cModel[1],2,34 - Depends on the position where the player is (worldpos)
cModel[3] (3-14, 24) -
Depends on the player's camera rotation
cModel[50],44,52 - Black
cModel[25] -
It has both camera rotation and player position.
(in different row)

I didn't find the rotation of the model in these matrices

Also, the cModelViewProj matrix does not have information about the rotation of the model, although it should (in EGSM it has information about the rotation)

[snow cradle]

I temporarily used the model matrix through lua. But I would like to have a working model matrix from the vertex shader.

local mModel = Matrix()
mModel:Identity()
mModel:Rotate(sticker:GetAngles())
mModel:SetTranslation(sticker:GetPos())
mModel:Invert()
mat:SetMatrix("$INVVIEWPROJMAT",mModel)

[wispy birch]

you could quite literally just consult the engine's vertex shader code to check where it gets that data from

[snow cradle]

I just don't understand why the data that should come to the model matrix doesn't come to it. (model rotation, model position).

In fact, it's as if I have the player's camera rotation and the player's position in the model matrix.

[snow cradle]

How are you doing? Who is doing what on shaders?

[mortal kettle]

Anyone make any godrays yet?

[hollow arrow]

That’s crazy work here, I wonder if there is performance downsize and how much does it “cost” in fps to do this

[snow cradle]

Thank you. Trees eat more fps than shadows themselves. Shadows don't care how many objects are in the frame.

Without trees I have 100 fps

I also get worldpos and worldnormals via MRT.

That is, I use only 1 RenderView to render the shadow map

That is, I don’t have processes that are not using computer resources efficiently.

You can also adjust the shadow map resolution. 2048x2048 is a good choice.
4096 will be expensive in terms of fps.

In general, shadows will still take away fps due to the call to render.RenderView. This is one of the most power hungry functions.

[hollow arrow]

Well I would love to try it and see to enter into this shaders world since I wanna get to s&box then and I don’t see a world where I can code something there without shaders 😂

Do you have good resources ? I seen shaders toy etc but I wonder how you deal with shadow and light like is it disabled by the screen space effect or do you like override it ? Cause the screen space effect is the thing I don’t really get

[snow cradle]

I do lighting with a technology called *Deferred shading".

I calculate all lighting in post processing. Then I pass the final result to the brush and model shader. And multiply (for example, this way i can add support for UnlitGeneric materials).

User can turn off the shadow rendering. Or player can take a "snapshot" and make the shadows static, without wasting resources on rendering the shadow map.

The shadow map can also be rendered every 200 units from the player. This may seem choppy, but it does not cause any loss of fps for weak computers and maintains a good picture.

[neat terrace]

||me can -> I can||

[snow cradle]

I don't know English

Thanks

Now I will add support for lights in the world. At least basic. So that they at least provide illumination by normals. Then I will try to make dynamic point lights with shadows, as well as directional light sources.

[bright spade]

is this viable in "large scale" multiplayer you think ?

[snow cradle]

Yes, I've run servers with shaders before.

[hollow arrow]

I wonder with that would it be possible to do like dynamic light env to do like day / night system but that don’t nuke fps cause we can already change skybox but not light env

[snow cradle]

++ I would show a completely black picture when there is no light, but apparently the specular brightens the picture. I will share new developments later.

In the shader it will be possible to change the color of shadows and the color of lighting.

[hollow arrow]

Ohh so nice

[icy plume]

looks great! I was wondering, what are the possibilities for viewmodel self shadowing?

[snow cradle]

simple point light

without shadows

This is a temporary addition to the sun's lighting. So that the light sources work at least somehow.

[snow cradle]

It would be good to add screen space shadows to the weapon.

The sun's illumination also works on weapons. I just haven't tested it yet.

[graceful lynx]

This seems like a group of people who might know the answer to a question: #developer-talk message

[rain marten]

made this silly thing while I was learning how to make shaders work on individual models

the shader is reading the "animated texture" from $basetexture and applying that filter to it

[graceful lynx]

Very nice

[short dirge]

this was already possible as a detail texture, but that's sort of faked. Very nice that you got it to represent the block aliasing accurately.

[snow cradle]

6 Point light using 1 shader
@keen coral's CalcPixelDiffLight function

[hollow pollen]

shadows when

[snow cradle]

I don't know. I'll try to render 24 lights at once for now.
4 materials * 6 lights = 24 lights

Then I will make env_projectedtexture support with shadows.

Then I'll make a flashlight

And probably only then dynamic point lights.

I don't want to make 6 cameras using 6 RenderViews

[hollow pollen]

fair

[snow cradle]

But maybe I'll have to

[hollow pollen]

could maybe avoid doing renderviews and just render the meshes that you want to cast shadows

would be a tad bit faster

[snow cradle]

Yes, that would be cool. Many rendering operations are not needed. Fortunately, you can skip a couple of hooks using:
drawviewmodel = false
viewid = 7,

But this still does not provide a noticeable increase in productivity.

All that remains is to do motion detection in front of the camera. That is, you need to catch the moment when something moves in front of the camera in order to update only it and its shadows.

Or you can make a mode where the camera takes a "shot" only once. And then the shadows will be static.

[hollow pollen]

from my experimenting viewid does nothing

[snow cradle]

It removes rendering of decals, sprites (possibly effects). This is from my observations.
(some values)

[hollow pollen]

oh cool

[finite quarry]

Can also make lights switch to non shadow casting versions at a distance

Being able to have static (“baked” once) lamps by itself is huge though, I really like that. There was a pull request for rubat to add that to the base game projected textures, but that’ll probably never get added

[keen coral]

pure suffering

[shadow shuttle]

oh Picasso i like it

[timid pumice]

Fucking great

[snow cradle]

||⭐||||⭐||||⭐||||⭐||||⭐||

[errant nacelle]

never thought I'd be doing scratch off tickets in discord

[snow cradle]

https://en.wikipedia.org/wiki/Shadow_volume

[graceful lynx]

Oh I love these shadows! I didn't know this was the name for them

[finite quarry]

stencil shadows are neat but iirc they get exponentially much more expensive with more polygons

and are also just not really realistic since no shadow is really perfectly sharp

[errant nacelle]

that's why you use shaders to blur them :^)

[finite quarry]

i suppose

but shadowmaps are more performant

[snow cradle]

I would like to cut render.RenderView and conditionally use only stencils. I don't know if it is possible. I guess it would be a good idea

That's why I don't know if it's possible to achieve optimization and fps boost using stencils by cropping the scene.

[finite quarry]

yea i'm not sure if stencils stop the actual rendering computation

[snow cradle]

Yeah. I'm not sure either. But I don't deny that it's possible. I hope that you can get a small increase in fps. But this is all guesswork. But the topic is interesting to me.

[wispy birch]

p sure they do

[misty surge]

Stencils are great for simple meshes; yeah!

Calling the mask and the scene at the same time wastes potentially useful performance. I avoided this, and tried my best to work around that idea.

With proper depth dealings instead of work arounds like renderview, we could load complex meshes with unique shaders just like EGSM with moderate effort it can be done. Hence why I think it’s important to continue to push what we got until it’s no longer discovery, rather useful unique shaders.

As soon as that happens, true geometry shading instead of recomputing the depth over back to 3D would be redundant.

[keen coral]

yes

[deep ether]

finally some good bloom

[snow cradle]

raw shadows maked using perspective camera (with fov)

so now i can try to make proj lights, flashlights, point lights

90 fov

[neat terrace]

csm......

[snow cradle]

so i need to make cubemap texure or simulate calculation like texCUBE result

If I make a cubemap texture, the point lights will be static

So I would prefer to simulate the result of the cubemap calculation using 2D textures. or mb i will try to make 2 cameras with fov 180°

[hollow arrow]

please someone give a crown to this man

[misty surge]

The shader king Forsure. He’s very versed in shaders.

[snow cradle]

https://blenderartists.org/t/a-better-way-to-fake-point-light-shadows/608591

[snow cradle]

so

my friend LVutner from stalker shader modding says what i can make atlas

and make point light without cubemaps

[shadow shuttle]

what is atlas?

[snow cradle]

https://kosmonautblog.wordpress.com/2017/03/25/shadow-filtering-for-pointlights/

[shadow shuttle]

okay i see

[snow cradle]

so atlas is this

many textures

in 1 texture

This is a solution to create a point light for gmod, since we can't make a cubemap through lua
@shadow shuttle

😎

[shadow shuttle]

👍 i like it very interesting

[snow cradle]

http://www.klayge.org/material/3_12/DPSM/DualParaboloidMappingInTheVertexShader.pdf

[snow cradle]

how to make sun shafts?

mb like that?

//code
#define step_leight 0.015
#define samples int(6)
//code

float3 eyeVec = (eyePos - worldPos);
float total_shadows = 0;
float3 newPos = worldPos.xyz;

for (int i=0;i<samples;i++) {
    newPos = newPos.xyz + eyeVec * step_leight;
    float4 newShadowCoord = mul(float4(newPos.xyz,1), g_invViewProjMatrix); 
    newShadowCoord.xyz/newShadowCoord.w;
    float shadow_depth = tex2D(ShadowMap, (newShadowCoord.xy * 0.5 + 0.5).g;
    float shadows = shadow_depth < newShadowCoord.z : 0 ? 1;
    total_shadows += shadows;
}

return float4(total_shadows.xxx,1);
//code

https://cs.dartmouth.edu/~wjarosz/publications/chen11realtime.pdf

[snow cradle]

bug

[shadow shuttle]

stuck in the white void forever

[snow cradle]

just test

This is something like a mask for sun shafts, only I highlighted the shadows. Because I haven't made a test map for sun shafts yet and it's easier for me to monitor the volume of shadows

[neat terrace]

god rays.....

[snow cradle]

i will make test map

lol

[snow cradle]

🤔🤔🤔

[shadow shuttle]

something is happening

[snow cradle]

w

[jolly talon]

Anyone know if I can get the view matrix instead of combined with projection in a vertex shader? Or any other way to know the distance of the vertex from the view origin I am trying to do

[snow cradle]

yea

LUA?

or HLSL

[jolly talon]

I just realized I am dumb and I passed the vertex pos into PS and could use the EyePosition to do it

my bad

[snow cradle]

do u need a lua view matrix?

[jolly talon]

I originally wanted to get the vertex position in view space so i could get the distance from the view origin using it

But u can just pass the pos into the PS and then distance from EyePos and it works fine

[snow cradle]

What shader are you making by the way? Did you use MRT?

I make sun shafts

[jolly talon]

Im making one of those LCD screen shaders that like shows RGB pixels when u go near it like a screen

Looks cool what ur doing

Is that with raymarching or something?

[snow cradle]

I don't know exactly what to call the method I use.

Simply put, I "step" a certain segment in space a certain number of times, checking whether the point (in the air, so to speak) is in the shadow.

[jolly talon]

Ye thats pretty much raymarching

[snow cradle]

I know what SSR use raymarching too

[jolly talon]

Ye lots of stuff does

Just gotta be careful with the loops coz everythings unwrapped in sm3 i think idk

[snow cradle]

I set the cycle to 128 for now xd

[jolly talon]

Thats gotta be fine lul

[snow cradle]

I recently played battlefield. I liked lens dirt on the screen.

I understand that this is done through the render target of emissive (using MRT or default ToneMap/Small RT) (bright objects on the screen), then checked for depth distance. And then a mask is created, which part of the lick should be multiplied by 1.

I also thought about implementing this shader in worldpos (when coordinates of lights are passed to the shader), but such an implementation would be much more complicated.

finally

[neat terrace]

how are you doing that? passing vertex pos into ps?

[snow cradle]

https://learn.microsoft.com/en-us/windows/win32/dxtecharts/cascaded-shadow-maps

[neat terrace]

shader csm in gmod

[bitter oriole]

[snow cradle]

so i will send pos and ang of 4 cascades to pixel shader. then i make 4 View matrices, 1 same Proj matrix i make on Lua. next i make 4 ViewProj matrices, also get shadows from 4 cascades and sum it.

also i will write 1 shadowmap cascade to 1 layer in render target (.r - fisrt cascade, .g - second, .b - 3, .a - 4)

the most harder: how to calc cascade pos and ang using lua (for cameras)?

Microsoft suggests making atlases, but I will gain in quality if I just spread the cascades across layers

i can make 1 rt 2048x2048 and get 4 cascades with 2k quality using 1 texture

profit

But there are downsides: cascades will make it more difficult to calculate solar rays (from a performance point of view)

but sun rays can be made by setting a small number of samples

[upbeat kernel]

Does anyone know if shader combos are or will be possible soon?

[jolly talon]

Is it possible to write a pixel shader that inherits the vertexlitgeneric shading with all the lighting and phong and stuff

[snow cradle]

no. unfortunately.

@upbeat kernel same

[snow cradle]

so now i need blur

[snow cradle]

ft @keen coral

[shadow shuttle]

its so good

[snow cradle]

SSR test

[graceful lynx]

World's wettest floors

[snow cradle]

next: bump, heigh, spec support

This will adjust the strength of the reflections.

[zinc sedge]

why are the reflections stretched out like that?

[kindred dock]

are it takes envmap's value or own value

looks too wet

[snow cradle]

no

[snow cradle]

Bumps, specs and heights will adjust the strength of the SSR

I haven't entered them into the calculations yet.

[snow cradle]

I don't know

[snow cradle]

Maybe I'll multiply the specular on cubemap parameter and output it via MRT

So you understand, just yesterday afternoon my SSR looked like this. By the evening a normal picture had appeared

What you are worried about is much simpler than the problems I faced and solved.

Before going to bed I decided to share the results.

Since I did SSR that day for about 12 hours

[kindred dock]

damn thanks for answering tho also one more question are viewmodel shadow is possible

[snow cradle]

A good solution for creating shadows on weapons would be to use Screen Space Shadows (and shadows from flashlights).

Well, the weapon, like any model, reacts to shadows from the shadowmap. But at the same time, it does not create these shadows itself.
Because the player's shadow (with his weapon in 3rd person) needs to be rendered from the sun and light sources (And not a first person weapon model).

[kindred dock]

oh thanks for answering 🙏

[snow cradle]

Perhaps I made a mistake in calculating the matrices. They differ in many ways from those presented in Microsoft articles and in OpenGL books.

[snow cradle]

this hidden image format works:

IMAGE_FORMAT_I8 = 5
IMAGE_FORMAT_R32F = 27
IMAGE_FORMAT_RG1616F = 30
IMAGE_FORMAT_RG3232F = 32
IMAGE_FORMAT_RGBA32323232F = 29

not works:

IMAGE_FORMAT_R16F = IMAGE_FORMAT_R16F or 38
IMAGE_FORMAT_D16 = IMAGE_FORMAT_D16 or 39
IMAGE_FORMAT_D32 = IMAGE_FORMAT_D32 or 41

i wanna use it for MRT

 /* 28 */ { "RGB323232F",          12, 32, 32, 32, 0, 0, 0, false, true, false },  // IMAGE_FORMAT_RGB323232F

but it now works too

[misty surge]

Niceee

[snow cradle]

This may be useful

D3D9EX = !GetConVar("mat_disable_d3d9ex"):GetBool()

local rt_normals = GetRenderTargetEx("_rt_Normals", SCR_W, SCR_H,
        RT_SIZE_NO_CHANGE,
        MATERIAL_RT_DEPTH_SHARED,
        bit.bor(256, 512),
        0,
        D3D9EX and IMAGE_FORMAT_RGBA32323232F or IMAGE_FORMAT_RGBA16161616F
)

[snow cradle]

Screen space shadows (good for grass)

Now I need to figure out how to apply them to grass models only.

IMAGE_FORMAT_R32F = 27 good for shadowmap, ssao pass etc (1 layer)

so 4K shadowmap IMAGE_FORMAT_RGBA32323232F = ~260+ megabyte size
IMAGE_FORMAT_R32F = ~60

[zinc sedge]

is this fixable?

[misty surge]

Nope, that’s how it’s rendered. Shadow casting uses inverted polys to reduce this behavior— except it generally comes with trade offs.

So ideally he can fix it by inverting the meshes, but it’ll lead to arches being also inaccurate. It happens in a lot of games, some have a good way of hiding it.

[snow cradle]

this is bias. it need to fix shadow acne.
Too much bias will skew the corners too much like result on photo. The magic right value is needed here.

[snow cradle]

mb like that

render.CullMode(MATERIAL_CULLMODE_CW)
render.RenderView( rtbl )
render.CullMode(MATERIAL_CULLMODE_CCW)

idk

[misty surge]

Exactly

At least in my experience it helped, it’s been a hot minute.

[snow cradle]

some SSR test #2
here spec, height support

so now i need add some params

etc

[dusty linden]

[lunar folio]

looks good

[snow cradle]

i also make shadows as post process

deferred rendering

And now I have one texture freed up for input into the shaders of models and brushes. This will allow PBR to do, since it has many textures for input, and now I have enough limits

[shadow shuttle]

it dont even look like gmod anymore 🔥

[snow cradle]

float FogEnd = 1/( (1/cFogParams.x)/(1/cFogParams.w) );
float FogRange = 1/cFogParams.w;

it works in pixel shader (cFogParams) Vertex shader -> Pixel shader -> make calc

[snow cradle]

The combined lighting results from static point lights and from a directional light. I also transferred the radial fog shader to .vcs from EGSM .ft @keen coral

[neat terrace]

this isn't gmod source, you're lying to me

[misty surge]

It’s all fake, the cake is a lie

[short dirge]

this seems oddly rendered for the time being. Tree lighting looks fine (a bit bright), but I can see the shadow mapping is darkening the lightsource, instead of the other way around where it should only brighten the shadow.

[snow cradle]

send me the formula

[short dirge]

shine a flashlight at a shadow when it's daylight out. The daylight doesn't get colored by the flashlight.

[snow cradle]

What about the formula?

[short dirge]

i can't help with that, only pointing out something I found wrong

[snow cradle]

btw i make (dir_light+point_light)*frame_color

[snow cradle]

Depends on how strong the flashlight is

and how strong is the sun

[short dirge]

I think there is another use for the weird lighting and that is tonemapping specific areas

From a game design standpoint, you can highlight those areas even if the lighting appears wrong.

[hollow arrow]

Hey brother it look so stunning, is there a public repo to kinda learn and see how you did ?

[snow cradle]

I can only answer individual questions. I do not leak source files. This is not accepted among shader developers.

I can also help

I will make the map with shaders publicly available

But without source code

[hollow arrow]

Ofc understandable, i'll shoot you a dm once i finish my gamemode to look a bit more how make vertex and pixel shaders communicate and how you was able to get like all the info we couldnt get in a shaders at first in gmod

[snow cradle]

Ok

[snow cradle]

Flashlight test

[wispy birch]

thats not true as far as i know lol
people do need examples on this stuff, more even, some may need to make small changes to some shader, and if they dont have the source, they wont be able to do that quickly

[snow cradle]

Most often, pseudo code is everywhere. That's what it's called.

Or theory. It is rare to find ready-made solutions

[snow cradle]

I will guide people if they have questions.

Perhaps forced video card recognition will make some NVIDIA image formats work.

-force_vendor_id 0x10DE -force_device_id 0x1088

IMAGE_FORMAT_NV_DST16 =           30 
IMAGE_FORMAT_NV_DST24 =           31 
IMAGE_FORMAT_NV_INTZ =            32 

[snow cradle]

MRT works only with 3d functions

like DrawQuadEasy

and not DrawScreenQuad

so we need 3d analog of DrawScreenQuad using DrawQuadEasy or DrawQuad

    render.SetMaterial(SNOW_MAT)
    render.SetRenderTargetEx(1,SNOW_MASK)
    local s = 0.009935
    local dir = EyeAngles():Forward()
    render.DrawQuadEasy( EyePos() + dir*5, Vector( dir.x, dir.y, dir.z ), ScrW()*s, -ScrH()*s, color_white )

idk how to calc it

[leaden wasp]

2 - 1

[snow cradle]

What are the options to pass data to the vertex shader?

Like CurTime etc

You can write fog parameters, but I use them not directly for fog

mb we can use cam.PushModelMatrix

idk

[misty surge]

https://wiki.facepunch.com/gmod/Shaders/screenspace_general#VIEWPROJMAT

maybe this? One of the floats?

I forget if that’s only fragment shader but I’d imagine it would need to be passed thru both?

[snow cradle]

this is c11 register in pixel shader (or c15).

I also thought that it gives a matrix to the input of the vertex shader, but for some reason valve made it so that it is written to the pixel shader

[misty surge]

Yikes

[snow cradle]

Unlikely, but anything is possible

[misty surge]

There’s gotta be a way to mess with the vertex shader like that.

[snow cradle]

In theory, you can sacrifice three fog parameters and use three parameters for your own purposes

But i dont like this

i will try to check pushmodel matrix on EGSM

I'll see if this affects the vertex shader matrices

it will be easier to figure it out

[wispy quartz]

There's free UV params already

mesh.TexCoord

[snow cradle]

Thank you! Can we write only 2 floats into the function? That is, float2 is available for input from potential float4?

also mb COLOR2(?) can be written using https://wiki.facepunch.com/gmod/mesh.Specular

[snow cradle]

source sdk:

void TexCoord1f( int stage, float s );
    void TexCoord2f( int stage, float s, float t );
    void TexCoord2fv( int stage, const float *st );
    void TexCoord3f( int stage, float s, float t, float u );
    void TexCoord3fv( int stage, const float *stu );
    void TexCoord4f( int stage, float s, float t, float u, float w );

[snow cradle]

mb here 5 args: texcoord num, f1, f2, f3, f4

[nocturne patio]

We can use 8 texture coordinates thanks to the stage parameter of mesh.TexCoord. I have confirmed all of them can be used in the vertex shader as long as $TCSIZE𝑛 material parameters are set to 2 (or larger).

[snow cradle]

can we write mesh.TexCoord in 3d hooks to influence the brushes of the world, models?

Or will this only work with meshes using mesh.Begin?

[nocturne patio]

I think it only works with IMesh created by the mesh library

[snow cradle]

Well, this can also be used. You can stretch the mesh to the size of the screen and transfer the positions and color of the light sources to it.

[snow cradle]

mesh.Specular( 0,1,0.5,1 )
Have you checked this function?
mb this is COLOR1 or COLOR2

[nocturne patio]

iirc mesh.Specular and mesh.UserData didn't do anything for me

[snow cradle]

meh

I'll go try to pull the matrices on EGSM to enter some number into them

[snow cradle]

lol

[timid pumice]

Wow is that cyberpunk??

[wispy quartz]

mesh.TexCoord(0/1/2/3/4/5/6/7, u, v)

TEXCOORD....

[snow cradle]

What about mesh.TexCoord(0/1/2/3/4/5/6/7, s, t, u, w)

like void TexCoord4f( int stage, float s, float t, float u, float w );

[wispy quartz]

mesh.Color takes only r, g, b, a arguments

[snow cradle]

Does this only work with meshes? Or is it possible to affect the world's geometry?

[wispy quartz]

just convert the world geomentry into meshes

[snow cradle]

Like duplicate it through Nik Naks? (brushes)

[wispy quartz]

yes

[snow cradle]

https://wiki.facepunch.com/gmod/PhysObj:GetMesh

as a possible option

[wispy quartz]

https://wiki.facepunch.com/gmod/util.GetModelMeshes

[snow cradle]

It feels like 4 render views are needed for the Paraboloid shadow maps:
Get FrameBuffer (depth) with offset + Render Scene from orig pos (2x) = 4 RenderView
http://www.klayge.org/material/3_12/DPSM/DualParaboloidMappingInTheVertexShader.pdf

It seems easier to make point lights through 6 renderview using the usual method (almost the usual one - without cubemap)

Perhaps this could be done if you pass the required matrix to the vertex shader and calculate everything without rendering.

Probably, it is possible to build a Paraboloid model using meshes, transfer the necessary data to textcords for assembling the matrix directly in the vertex shader.

I'd better go and make point lights through 6 textures. Somehow I'm not mentally ready for this level of mathematics.

A hack for using cFogParams.z as CurTime in a vertex shader.
const float4 cFogParams : register(c16);

Fog parameter is passed to pixel shader (for custom fog)

local hookName = "shaderlib"

Shader = Shader or {}
RegisterMetaTable( "Shader", Shader )
Shader.SetShaderCurTime = Shader.SetShaderCurTime or render.FogMaxDensity

hook.Add("Think", hookName, function()
    --Shader.SetShaderCurTime( 1 - 1/CurTime() )
    Shader.SetShaderCurTime( 1 - 1/ (CurTime() % 1000) )
end)

FOG_MAX_DENSITY = FOG_MAX_DENSITY or 0

function render.FogMaxDensity(maxDensity)
    FOG_MAX_DENSITY = maxDensity
end

function render.GetFogMaxDensity()
    return FOG_MAX_DENSITY
end

[snow cradle]

Laggy 😧 (Precipitously)

hook.Add("Think", hookName, function()
    Shader.SetShaderCurTime( 1 - 1/ (CurTime() % 1000) )
end)

% removes twitching, but it can cause micro bugs

[snow cradle]

Hardcoded treesway

#define g_flStartRadius float(0.1)
#define g_flRadius float(300)
#define g_flHeight float(1000)
#define g_flStartHeight float(0.2)
#define g_flSwaySpeed float(2)
#define g_flScrumbleIntensity float(0.1)
#define g_flFastSwaySpeedScale float(1)
#define g_vWindDir float2(1,0)
#define g_flSwayIntensity float(5)
#define g_flSwayFalloffCurve float(1.5)
#define g_flScrumbleWaveCount float(0.1)
#define g_flScrumbleFalloffCurve float(0.1)
#define g_flWindSpeedLerpStart float(3)
#define g_flWindSpeedLerpEnd float(6)
#define g_flScrumbleSpeed float(0.1)

[snow cradle]

Error: Bitwise operations not supported on target ps_3_0

#define bytes int(Constants1.w)
#define PARALLAX            bool(bytes >> 16)
#define PARALLAXCORRECT     bool(bytes >> 8)

[snow cradle]

https://tenor.com/view/wtf-blink-steve-harvey-confused-not-sure-gif-15495627

it works only dx10+

[wispy birch]

bytes / 0x10000 % 1
bytes / 0x100 % 1

[snow cradle]

🤔

Has anyone tried doing displacements? What value is responsible for painting the vertices?

I checked the output:
float4 vColor : COLOR0;
float4 vColor1 : COLOR1;
and cModulationColor

And it's empty there

[snow cradle]

float4 lightmap = tex2D( LightmapSampler, i.lightmapCoord );
float blendFactor = lightmap.a;
float4 color = 2.0f * lightmap * lerp( base2, base, blendFactor );

https://github.com/nillerusr/source-engine/blob/29985681a18508e78dc79ad863952f830be237b6/materialsystem/stdshaders/WorldVertexTransition_ps2x.fxc#L4

I don't have a lightmap sampler. 🤔

[snow cradle]

Although it would be logical if the mixing was in COLOR0

[snow cradle]

4 blending textures using photoshop mask

float2 blend_uv = (worldPos.xy+blendOffset)*blendScale;
    float4 blendMask = tex2D(tBlendMask, blend_uv);

    float4 base1 = tex2D(tBaseMap, texCoords);
    float4 base2 = tex2D(tBumps, texCoords);
    float4 base3 = tex2D(tMRAO, texCoords);
    float4 base4 = tex2D(tMRAO, texCoords).bgra;

    float4 color    = lerp( base1, base2, blendMask.r );
    color           = lerp( color, base3, blendMask.g );
    color           = lerp( color, base4, blendMask.b );

so it need mega textures

[snow cradle]

mega texture

.rgb color + .a ao (2x)
.rg bump + .b height + .a rougness (2x)

[snow cradle]

lol how to use it

[snow cradle]

simple example how to use megatextures:

    float2 texCoords = i.vTexCoord.xy;
    texCoords /= 4;

    float2 texCoords_base = abs(texCoords)%1;

    if (texCoords_base.x > 0.5) {
        texCoords_base.x -= 0.5;
    }

    if (texCoords_base.y > 0.5) {
        texCoords_base.y -= 0.5;
    }

    float4 base = tex2D(tBaseMap, texCoords_base);

bug:

[snow cradle]

texture blending using mega texture

[dusty linden]

Could there be a secondary layer akin to $detail to break up (seamless) repeating textures?

[snow cradle]

This can be done easily

[snow cradle]

some parallax effect (using height from megatexture)

[dusty linden]

I wonder if true displacement is possible.

I'm not imagining something ultra high res but more like simple meshes.

Sort of like this

Displacement texture comes with the material

Adds a bit of variety to otherwise 'flat' ground surfaces

[snow cradle]

Displacement mapping, geometry shader, DX10+

[dusty linden]

Hm. I saw someone post a video where they were displacing a water (think it was just normal surface, retextured) volume using shaders on CS:S

Lemme find it

https://media.discordapp.net/attachments/1039243316920844428/1323485078789292114/cstrike_win64_KAndQpBflg.mp4?ex=6829f547&is=6828a3c7&hm=95b87d5fa676c98005e2f90bd2834050aa52b4ed29142ef41b542485a23e7a12&

Found it

Posted by ficool

Yeah, you're right, true displacement isn't possible. Maybe like a fake. Subdivided meshes, maybe?

[snow cradle]

we can use real groups of meshes - big-medium stones etc (models).

[dusty linden]

Yeah, I agree.

[dusty linden]

Very nice

[snow cradle]

Displacement blending & megatexture test: parallax, bumps, spec, ao.
(some bugs - lines)

[graceful lynx]

Very impressive

[shadow shuttle]

I agree

[graceful lynx]

Somehow the resolution of those textures is lower than I think it should be?

[snow cradle]

original size texture: 4096 (single)
I make megatexture: 4 textures in 1 texture

Maximum sane texture resolution: 4096
So each ground texture became 2048 to fit into the atlas
Without texture size reduction, the mega texture would be 8192 pixels in size. That would be a lot

Using mega textures it will be possible to make a blend of 4 earth textures.

[graceful lynx]

Ah, I see

[snow cradle]

But now I have a task: How to use the grass

[graceful lynx]

How are they compressed to a smaller size?

[snow cradle]

yea. 4096 -> 2048

[graceful lynx]

I mean the scaling function. Nearest neighbor?

[snow cradle]

Sorry. I find it hard to understand what you're saying through Google Translate.
xd

[graceful lynx]

No problem at all

[graceful lynx]

https://wiki.facepunch.com/gmod/render.PushFilterMin

Which option do you use?

[snow cradle]

float2 texCoords = i.vTexCoord.xy;
texCoords /= 4;
texCoords = frac(texCoords);
float2 isUVPositive = 1.0 - step(0.0, texCoords);
texCoords = isUVPositive + texCoords;
float2 tc_offest_raw = step(texelSize, texCoords);
float2 tc_offest2_raw = step(texCoords, texelSize);
float2 tc = texCoords;
tc -= tc_offest;
float2 tc2 = texCoords;
tc2.x += (1.0 - tc_offest_raw.x) * texelSize;
tc2.y -= tc_offest.y;

tc = uv of 1 textel

tc2 = uv of 2 textel

[graceful lynx]

You do this resolution reduction within a shader?

[snow cradle]

I don't quite understand what resolution reduction means, but yes. I do all the calculations in the shader. Without lua.

My friend and I managed to get chunks of pixels from a mega texture without using if

[graceful lynx]

I curse language barriers

[snow cradle]

aa so i make 4096 -> 2048 using photoshop

While I'm collecting mega texture

[snow cradle]

https://tenor.com/view/joe-romula-gif-25005360

[graceful lynx]

I think the way the texture atlas is sampled in your shader is causing strange aliasing in the final image. If the atlas was made in Photoshop, the texture should be downsampled with high quality and antialiasing. So, if there is aliasing, I believe it is caused by how the shader samples the texture.

[snow cradle]

here my texture flags

DTX5

mb i need enable Anisotropic?

[graceful lynx]

Could be

[snow cradle]

Also, the DXT5 format can degrade image quality. But saving 4k texture without compression is expensive in terms of hard drive space and content.

[graceful lynx]

That could also be a part of what I am seeing. I don't know enough about shaders to know if I am seeing a problem or something normal

Whatever the case, I think you are creating very impressive shaders

[snow cradle]

Thank you!

I'm currently thinking about how to place grass objects.

To make them shaders using a popular method, you need DX10+

I can use prop_detail. But it can be expensive in terms of entity limit and number of objects.

[graceful lynx]

You could potentially create a pool of prop_detail that are re-used to avoid an issue with the entity limit

[snow cradle]

here with Anisotropic 🤔🤔

[snow cradle]

mb

[graceful lynx]

Much better!

I think so, at least

[graceful lynx]

Can you create a direct comparison? Standing in the same place and facing the same direction with Anisotropic enabled and then disabled?

I think the heightmap would look obviously aliased here without Anisotropic enabled

[snow cradle]

here no different 😭😭😭

Anisotropic/Trilinear

mb it need restart game

idk

[snow cradle]

Parallax shadows

[zinc sedge]

Maybe https://www.deepl.com/en/translator would be better?

[snow cradle]

grass in gmod is: prop_detail and prop_detail_sprite

Looks like I'll have to manually put it on the map.

[snow cradle]

also i wanna make mixing textures using height map as mask
like $blendmodulatetexture

[snow cradle]

Since I'm doing ground texture blending in Photoshop, I'll have to come up with an algorithm for spawning grass in the world.

I imagine it like this:

• I create a trigger (func_grass), which will need to highlight the places where the grass should appear.
• The grass will spawn along the upper border of the trigger and define the floor via a trace line.
• The grass will most likely be a mesh
• The grass will have its own shader

[wispy birch]

i imagine there are ways to make the detection automatic:
simply check for surface materials on brushes/disps against a known whitelist, maybe also a regex (contains "grass"/"dirt", ...)

[snow cradle]

while creating a mask for mixing displacements in photoshop, i lost the ability to influence the displacement surface

[obsidian merlin]

A simple shader idea: nearest neighbor but with mipmapping a la GZDoom

crunchy textures without the bizarre moire effects when textures are far away

[leaden mesa]

https://developer.valvesoftware.com/wiki/$pointsamplemagfilter

[obsidian merlin]

Yep. That, but not in Counter-Strike: Global Offensive.

[hardy acorn]

I've made a blackhole, this is my first test with shaders in gmod

(in the last version the black circle isn't pixelised like that)

do you think shaders is a viable alternative of particules in gmod ?

[neat terrace]

entirely dependent on a case-by-case basis, but for strong visual effects like that black hole, shaders definitely help

[snow cradle]

mesh.UserData( mesh_data[i].corner.x, mesh_data[i].corner.y,0,0 )
works

struct VS_INPUT
{
float4 vTangentS                    : TANGENT;
};

[snow cradle]

mesh.Color( 255,0,0,0 ) works:

struct VS_INPUT
{
    float4 vColor                       : COLOR0;
};
struct VS_OUTPUT
{
    float4 vColor                       : COLOR0;
};

VS_OUTPUT main(const VS_INPUT v)
{
    //code
    o.vColor = v.vColor;
    return o;
}

[hardy acorn]

Someone told me that Garry's Mod shaders don't work on all PCs and can cause crashes due to differences between GPUs. Is that true?

[timid pumice]

tell us who told that, we gonna kick his ass

[hardy acorn]

A random guy who asked to ChatGPT and now saying that my shaders will crash players' computers

[snow cradle]

screenspace_general does not work on Directx 8.1. So shaders really don't work on all pc's.

If your video card is GeForce FX 5800, it's never too late to upgrade.

[hollow pollen]

sm30 can technically freeze your gpu with infinite loops

would pretty much be the same as doing while true do end though, I don’t really see any reason to do it other than for difficult to trace crashes intended to cause harm

[snow cradle]

@nocturne patio For some reason my meshes disappear when I enter $tcsize1 2. Have you had this problem?

[nocturne patio]

Props with RenderOverride disappeared with $tcsize1 "2" but IMeshes didn't.

[snow cradle]

By the way, in which hook do you render the mesh? Share the code please.

[nocturne patio]

Very ugly, but this is the code. The only thing to note is passing a random LightmappedGeneric material as the IMesh hint.
https://pastebin.com/iV6Rx3nM

[snow cradle]

can u share your vmt?

I don't quite understand what could cause the mesh to disappear.

[nocturne patio]

Probably the $flags2 matters, I guess.

screenspace_general
{
    $pixshader "myshader_1_ps30"
    $vertexshader "myshader_1_vs30"
    $basetexture "metal6"
    $texture1 "\[lightmap1]"
    $cull "1"
    $fix_flags2 "510"
    $softwareskin "1"
    $writealpha "1"
    $depthtest "1"
    Proxies
    {
        Equals
        {
            srcVar1   $fix_flags2
            resultVar $flags2
        }
    }
    $tcsize1 "2"

[hardy acorn]

Hi, this is really cool, are you continuing this project ?

I was checking to do the exact same thing into garry's mod, i was checking the glsl code of a minecraft shader called Iteration 3.0 which exactly do that and i discovered that he was using a pre existant and very realistic blackhole code, you can check it out if you are interested or if you want some exemples

https://www.shadertoy.com/view/lstSRS

I will train myself by doing a night sky like there is in minecraft shaders and after that i will try to port this blackhole into gmod

[misty surge]

I have been dealing with real life problems. It’s been tough for myself and my wife, so I’ve put a hold on development to develop my life IRL.

If you really have any questions at all, I implore you to ask. It’s been 2 months since I’ve continued work on the shaders and game I was intending to launch this summer but this life changing situation has taken all of my time.

[cosmic perch]

Hope things get better for u soon

Just be patient and u will pass through these problems

[misty surge]

I will bro, thank you. I will hope when I do come back everything should be broken. 🙂

[heavy blade]

get better my fellow programming mate

[hardy acorn]

what is the best way to replace the gmod sky with my shader ?

https://www.shadertoy.com/view/WcK3D1

[snow cradle]

can we use tangent using screenspace_general?

float4 vTangentS                    : TANGENT;
float3 vTangentT                    : BINORMAL;

@nocturne patio

Have you tried it?

I just get a black image

And the method of receiving tangents via ddx, ddy is not very good

[nocturne patio]

Tangents are available in screenspace_general but it's required to set $vertexnormal or something similar parameter to 1

[snow cradle]

Have you tried using tangent?

[nocturne patio]

Yes, I remember I could get tangents and binormals

[snow cradle]

This worked for you on models? physics prop?
Have you used the functions below?

    float3 vNormal; float4 vTangent;
    DecompressVertex_NormalTangent(v.vNormal, v.vTangentS, vNormal, vTangent);
    float3 worldNormal, worldPos, worldTangentS, worldTangentT;
    SkinPositionNormalAndTangentSpace(false, v.vPos, vNormal, vTangent, v.vBoneWeights, v.vBoneIndices, worldPos, worldNormal, worldTangentS, worldTangentT);

[snow cradle]

o

this?

I want to modify the rt of normals using bumps, calculating them with tangents.
And if you get tangents through pixel shader calculations, then the normals will differ in tone depending on their location in the world. Therefore, it is important for me to get tangents from the vertex shader.

//Builds a cotangent frame. Source: http://www.thetenthplanet.de/archives/1180
void build_contangent_frame(float3 position, float3 normal, float2 uv, out float3 tangent, out float3 binormal)
{
    float4 duv = float4(ddx(uv), ddy(uv));
    float3 dp1perp = cross(normal, ddx(position));
    float3 dp2perp = cross(ddy(position), normal);
    
    tangent = dp2perp * duv.x + dp1perp * duv.z;
    binormal = dp2perp * duv.y + dp1perp * duv.w;
    
    float invmax = rsqrt(max(dot(tangent, tangent), dot(binormal, binormal)));
    
    tangent *= invmax;
    binormal *= invmax;
}

I'm also interested in adding MSAA support for deferred rendering:
Goldermore once told me that you can multiply the size of the worldpos and worldnormals targets by the MSAA number. I haven't tried it in practice yet.

[hardy acorn]

do someone know how to extand the depth buffer of the source engine/garry's mod ?

i'm trying to replace the sky with my shader and to do so i'm trying to check the .w (depth) of the pixel to write only on far pixels, but the depth buffer of the source engine is very (very very) limited

[hardy acorn]

nevermind Evgeny Akabenko showed me this:
https://wiki.facepunch.com/gmod/GM:PostDraw2DSkyBox

[graceful lynx]

If your goal is to completely replace the skybox, you should instead use this hook and its return value to prevent the skybox from drawing at all
https://wiki.facepunch.com/gmod/GM:PreDrawSkyBox

[hardy acorn]

thanks ! i will check that right now

[hardy acorn]

thanks it worked !!!

[graceful lynx]

I'm glad to hear it!

[snow cradle]

more parallax samples

[shadow shuttle]

hey thats really detailed

[vapid reef]

finally, touching grass in gmod

[snow cradle]

How to use gmod water refraction for water shader?

if i wanna make custom water shader

sampler ReflectSampler : register( s2 );

what rt is water refraction?

[livid cliff]

uhhh I think it's _rt_waterrefraction

Completely off the top of my head

[snow cradle]

hmm ok

[graceful lynx]

You can use render.GetRenderTarget() in hooks to get the name of the RTs which call it. I find this very helpful for finding this kind of info out

hook.Add( "PostDrawTranslucentRenderables", "A1_RenderTargetTesting_ClearWaterRenderTargets", function()
    local renderTargetName = render.GetRenderTarget():GetName()
    if renderTargetName == "_rt_waterreflection" or renderTargetName == "_rt_waterrefraction" then
        render.Clear( 0, 0, 0, 255, true, true )
    end
end )

Some code I wrote for testing this earlier. It has the names you need

I’m on mobile so I’m just pasting the whole code. Sorry for the inconvenience

[snow cradle]

Bad tridp

[snow cradle]

bad trip #3

help

[graceful lynx]

What you see 0.01 seconds before impacting the ground after failing a jump in Mirrors Edge

[leaden mesa]

peak mentioned

[snow cradle]

Optimized SSGI using emissive targets (It will look good in combination with Bloom.)
hight params

Medium params

[hardy acorn]

is there a linux version of the sdk_screenspace_shader compiler ?
https://github.com/ficool2/sdk_screenspace_shaders

[hardy acorn]

th answer is: no

I'll try to do it myself tomorrow and send a pull request

[lime trellis]

Hello shader peopels, so ficools shader compiler builds hlsl files into usable fxc shader for the game, but what im wondering is how would I decompile the shaders that are already in gmod into hlsl files?

for example any of these ones

[hollow arrow]

#1324464901401477191 message

[shadow shuttle]

👍

[lime trellis]

i love u gng ❤️

[hardy acorn]

update: this is not possible cause ShaderCompiler.exe is made for windows and cannot be compiled on Linux (cause it use DirectX)

the only way is to use the new hlsl compiler of microsoft "dxcompiler" which is open-source and based on LLVM/Clang, but we must write a tool that convert the outpouted dxbc into vsc and for the moment i have no time to do this

[wispy birch]

...or you could just make the ShaderCompiler thing reference dxcompiler as its internal compiler
however, keep in mind that ver 2.0 and 3.0 are based on the very old fxc compiler, which uses its own bytecode, not spir-v

[lucid bane]

Hey, I have 0 knowledge when it comes to shaders, especially gmod ones with what is capable--was wondering if it's possible to make a shader that would apply some sort of dithered transparency effect to a ragdoll? Like perhaps knowing which ragdoll could be assisted with lua?
Im not too sure what's possible so Id rly appreciate if anyone could point me in the right direction 🫶

[lunar folio]

Anyone else have issues with shader model 3.0 shaders just not rendering/showing up for some people?

I wrote one using (https://github.com/Srlion/RNDX/ 's templates), it works fine for me and many others as 3.0, but some people just can't see it.

I compiled a 2.0 version too and they see that just fine.

trying to find if its a specific gmod setting or something

ive tried shader settings already

(the shader just makes it look like an arcade screen, crt-esque)

[cosmic perch]

ask about their hardware details

there was an issue with intel that was fixed, maybe @jovial tide can have more info about this

[lunar folio]

seems to be amd gpu's as far as I can tell

[vapid reef]

if theyre on the linux native version of gmod they wont have sm3 support im pretty sure

[lunar folio]

on windows

very strange

[cosmic perch]

get more details about them pls, like cpu/gpu model and such stuff

[misty surge]

https://wiki.facepunch.com/gmod/render.SupportsPixelShaders_2_0
if only we had a 3_0 check

Using dx9 libs, that wouldn’t be too hard. That would allow at least some validation.

[placid stream]

maybe submit a request here? https://github.com/Facepunch/garrysmod-requests/

[snow cradle]

bump

[timid hedge]

Is there a shader version of surface.DrawPoly yet?

a (relatively) free performance improvement for that would be incredible

[lunar folio]

seems pretty typical

(GPU is AMD 7900 XTX Nitro+)

[lucid bane]

bump? Im poking at it, I don't think it's even possible at all

[snow cradle]

https://github.com/Facepunch/garrysmod-requests/issues/2768
like it pls 🙏🙏🙏🙏

[shadow shuttle]

sir yes sir

[wispy quartz]

Just use wine

[wispy quartz]

Nah it worked on my friend's pc
He had intel + native linux

Might be that some people actually use dxlevel 90 or smth like that because of that fps configs etc, which doesn't support 3.0 shaders

[leaden wasp]

https://tenor.com/view/wine-pasta-gif-20078563

I put a little wine in it

[misty surge]

I will! When I get a chance I’ll submit a request and post it here.

[shadow shuttle]

hey gmod shadermasters, anyone showcase or talk about pbr stuff lately?

[lunar sinew]

dude pbr shaders would save me so much resources

we need it 🙏

[shadow shuttle]

https://github.com/meetric1/gmod_shader_guide hey this is cool

Evgeny's shader stuff is showed there thats also cool

[graceful lynx]

Oh hey, this is exactly what I was hoping someone would make

[errant nacelle]

somebody put that on the wiki

[turbid crystal]

Is there a way to check if a pixel is at or off the edge of the screen.
(or to atleast detect if a pixel has a value or not.)

[turbid crystal]

Was messing with my attempt at a sobel shader and discovered it was probably trying to get nonexistent values at the edge, causing it to stretch.

Not quite sure how to detect the edge pixels because I don't know what values those return.

This also causes it so every time something bright is at the corner of my screen, the it effects the WHOLE screen.

[snow cradle]

do u use default vertex shader?

u can use custom pp vertex shader

mb

[turbid crystal]

I think so? I'm not entirely sure, I don't think I do anything relating to vertex shader.

[snow cradle]

try it

[turbid crystal]

Do you have the source code for this so I know what's actually going on, also I think I use the ps20 version stuff so I'm not sure how well it'd work

what difference does a custom pp vertex shader make?

[snow cradle]

no screen bug

[turbid crystal]

I'm not sure if using that would automatically work with my _ps2 shader stuff?

[snow cradle]

my friend and my has this bug with default vertex shader

screen bug

I assumed that the problem might be in this. I don't know. I went about my business.

try, maybe it will work. As you wish

[turbid crystal]

I'll keep it in mind.

[turbid crystal]

I discovered partially why my thing was doing this, turns out uv stuff is 0-1 so multiplying my pixel checking thing by texbasesize made it so it wasn't checking off screen lol

[thick osprey]

this is a very crude script i'm using to make custom shaders work on any entities. With it you can just apply the material with the material tool and it will work. All you need to do is add a CustomShader {} proxy to your vmt

[turbid crystal]

Evil gmod (color inversion) and my silly sobel shaders

just uuuh don't look at the sun while you have a sobel filter active

[hardy acorn]

I love the final look

[turbid crystal]

Yeah it's based off of an old egsm shader I had.

It kept being buggy but I eventually figured it out.

[snow cradle]

@ Phantom

u can start work with shader making Color Correction. it need only FrameBuffer

here download shadersrc
https://github.com/ficool2/sdk_screenspace_shaders
pp_vs30.hlsl - default fixed vertex shader ||(default has bug)||

then try to make output in pixel shader and see difference

[kindred rampart]

thx

[snow cradle]

LUA example to run shader on scree lua\autorun\client

@kindred rampart

[graceful lynx]

Looks like scorch marks after a bomb exploded

[snow cradle]

trying to make point light

now i need to get z

for (int face = 0; face < 6; ++face) {
        float4x4 View = lookAtDirection(directions[face], ups[face]);
        float4x4 ViewProj = mul(View,g_ProjMatrix);

        float4 shadowCoord = mul( float4(worldPos,1), ViewProj ); 
        shadowCoord.xyz /= shadowCoord.w;

        shadowCoord.xy = shadowCoord.xy * 0.5 + 0.5;
        
        shadowCoord.y = shadowCoord.y * tileHeight + face * tileHeight;

holy shit

6 ViewProj matrix

It's a little more complicated than cascades. In theory.

[misty surge]

Yikes, that would be expensive. However perhaps a RT generated once should be perfect for static scenes. Forget about updating that every frame lol, I wonder how the performance would be.

[snow cradle]

How can I calculate matrices and where?

I could calculate half of the matrices in the vertex shader and pass them to the pixel shader

If there was an option to pass the position of the light source to the vertex shader

struct VS_OUTPUT
{
    float4 projPos                    : POSITION;
    float2 uv                : TEXCOORD0;

    float4x4 View0                : TEXCOORD1;
    //dummy                : TEXCOORD2;
    //dummy                : TEXCOORD3;
    //dummy                : TEXCOORD4;
    float4x4 View1                : TEXCOORD2;
    //dummy                : TEXCOORD3;
    //dummy                : TEXCOORD4;
    //dummy                : TEXCOORD5;
    float4x4 View2                : TEXCOORD6;
    //dummy                : TEXCOORD7;
    //dummy                : TEXCOORD8;
    //dummy                : TEXCOORD9;
    float4x4 View3                : TEXCOORD10;
};


#define FACES 6
#define light_pos??????? float3(0,0,0)

struct struct_mView {
    float4x4 View;
};

VS_OUTPUT main( const VS_INPUT v )
{
    VS_OUTPUT o = ( VS_OUTPUT )0;

    float4 vProjPos = mul(  v.vPos, cViewProj );
    vProjPos.z = dot( v.vPos, cViewProjZ );
    o.projPos = vProjPos;
    o.uv = v.uv;

    struct_mView mViews[FACES];

    for (int face = 0; face < FACES; ++face) {
        float4x4 View = lookAtDirection(directions[face], ups[face]);
        mViews[face].View = View;
    }

    o.View0 = mViews[0].View;
    o.View1 = mViews[1].View;
    o.View2 = mViews[2].View;
    o.View3 = mViews[3].View;

    return o;
}

I don't remember how many tex coordinates can be output from a vertex shader

[snow cradle]

But of course the best solution would be to make dual parabaloid point lights

But I don't understand how to make them

[snow cradle]

Anyone want a collaboration with procedural sky?

We could work together to develop a procedural sky

Because it doesn't require any buffers.

We could code right here and send our ideas to the sky

This is my old shader. I didn't know much back then. There may be ineffective moments, inaccuracies.

[misty surge]

Your work is far from inaccuracies, lol. You’re a shader GOAT ofc

[snow cradle]

There were times

In short, as far as I know, there are two colors of the sky. The top one is blue. And the bottom one is the color of the sun (it goes like a rim along the bottom)

[misty surge]

Did we come up with some idea for pushing data to the vertex buffer dynamically? Aside for UV coords? :0

[snow cradle]

Yea

render.SuppressEngineLighting(true)
render.SetModelLighting(0, 0, 255, 128)

we can use it before drawing sky sphere

and it must works

render.SetModelLighting(0-5, x, y, z)

18 float to input to vertex shader

but it works only on 3D funcs

lika DrawBox, DrawQuad, DrawSphere, models and meshes (or maby world)

6 sample
https://github.com/meetric1/gmod_shader_guide/blob/main/lua/autorun/client/shader_examples.lua#L73

@kindred rampart

By the way, it would be nice for you to make the sky too, since you don’t need any buffers to develop it.

This would be a good start for you.

1. You can make stars in the sky (possibly through 2D perlin noise).
2. Northern Lights, but it can be difficult (I know the way through ray marching).
3. Rainbow (based on a black and white mask).

the rainbow mask is usually presented in gray tones and through conditions (or equations) each shade is assigned its own color

[misty surge]

That’s awesome. The stars is very easy too.

[snow cradle]

https://www.shadertoy.com/view/tcKXzm

Threw something))

[snow cradle]

dual-paraboloid

https://graphicsrunner.blogspot.com/2008/07/dual-paraboloid-reflections.html
https://graphicsrunner.blogspot.com/2008/07/dual-paraboloid-shadow-maps.html

[hardy acorn]

I ported and modified a shader from shadertoy to Garry's Mod
https://cdn.discordapp.com/attachments/723258310559662160/1383956410987188264/2025-06-16_01-40-00.mp4?ex=6850ad59&is=684f5bd9&hm=0bb1862b725dd980719246b88ed0c336a8292fedc93c61a1d0119c458efe8208&

[livid cliff]

Oh wow, that looks really cool. The reflection in the water is also lovely

[hardy acorn]

Thanks, this is just a firt apptempt, i want to have results as good as minecraft shaders

my ultime goal is to reproduce this night sky in gmod

[misty surge]

Looks way better than mine, but very nice work dude!

[zinc sedge]

how does it look from other angles...

[fickle ocean]

Very nice

[wintry wagon]

With the new shader advancements etc i'm looking at making my own shader etc. I've managed to get it in the game however because it is required to use _rt_FullFrameFB it always draws full screen. Am i dum dum or is there a fix for this?

[hardy acorn]

what are you trying to do exactly and how a you doing it ?

[wintry wagon]

So i've followed the post that was recently made about the discovery of being able to make custom shaders.

I've tried creating my own custom shaders which worked (its like an old computer shader thing)

I want to project it onto a 3d2d panel.

Realisticly i can tell you what i'm doing rn but i do not have much experience in this. I do know that regardless of what i do the shader keeps showing to my entire screen instead of a specified panel

[hardy acorn]

so you want your shader to be fixed on a specific pos ?

@wintry wagon

[wintry wagon]

Yes, i want to draw it in a vgui if possible.

[hardy acorn]

your shader is just a materials so i guess you could do this

    surface.SetMaterial(name)
    surface.SetDrawColor(color or color_white)
    surface.DrawTexturedRect(posx, posy, sizex, sizey)

[wintry wagon]

Tried but it didint want to work.. yk ill send the shader tmrrw

[hardy acorn]

np, see you tmrrw

[cosmic perch]

check
https://github.com/meetric1/gmod_shader_guide
&
https://github.com/Srlion/RNDX

[wintry wagon]

It doesn't seem like your libary supports changing material variables? Doing stuff such as material1:SetFloat("$c0_x", CurTime()) has 0 effect.

however if i do this in a HUDPaint and draw the texture manually etc it does work.

[cosmic perch]

My library not to do ur stuff, just telling u as a ref

Ofc u have to keep running setfloat

Checkout the other thing I linked it has way more details

[wintry wagon]

have been doing that

[wintry wagon]

rn it's just a white screen background

[hardy acorn]

a white screen like this?

[wintry wagon]

I can draw a panel over it and change the color whilst retaining the effect however it's not possible to make it translucent

[hardy acorn]

I know that this is possible, for exemple the material pp/blur work perfectly on a vgui, maybe check the vmt file to take an example, or like srlion said check his RNDX repo cause he is using shaders in vgui exactly like you want.

this is how I'm using blur:

local blur = Material("pp/blurscreen")
local function DrawBlur(panel, amount) local x, y = panel:LocalToScreen(0, 0) local scrW, scrH = ScrW(), ScrH() surface.SetDrawColor(255, 255, 255) surface.SetMaterial(blur) for i = 1, 3 do blur:SetFloat("$blur", (i / 3) * (amount or 6)) blur:Recompute() render.UpdateScreenEffectTexture() surface.DrawTexturedRect(x * -1, y * -1, scrW, scrH) end
end ```

try to do the same thing with your shader

it should work

@wintry wagon

[errant nacelle]

just use the blur from rndx tbh it looks so much nicer and it doesn't tank performance

[wintry wagon]

The goal is not to do a blur but to do a different shader.