How to use POM Shader Graph for more realistic | Official Unity Discord | Page 1

bright halo Aug 9, 2025, 5:02 PM

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How to solve it... Idk

bright halo Aug 9, 2025, 11:14 PM

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How to use POM Shader Graph for more realistic

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mellow epoch Aug 10, 2025, 1:10 PM

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You're not doing any vertex displacement here.

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You need to modify the vertex position

bright halo Aug 10, 2025, 1:12 PM

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mellow epoch You need to modify the vertex position

I have it

mellow epoch Aug 10, 2025, 1:15 PM

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bright halo I have it

try changing the normal vector to object space.

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Also share your height map

bright halo Aug 10, 2025, 1:18 PM

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If i turn on shaded wireframe

bright halo Aug 10, 2025, 1:18 PM

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mellow epoch try changing the normal vector to object space.

Nothing changed

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mellow epoch Aug 10, 2025, 1:18 PM

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This doesn't seem like a height map to me

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Or at least, it's not gonna produce the effect that you expect

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The deeper parts need to be darker.

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But it doesn't seem like it's applied to your mesh properly as well.
Possibly due to uv/tiling/offset or LOD settings.

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I'd try removing these to make sure you don't mess them up in the material

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And set the normal vector space to object.

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Then try playing with the displacement multiply parameter(make sure all 3 vector components are set to the same value). Try setting it to 1-10 and see if there is any difference.

bright halo Aug 10, 2025, 1:27 PM

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mellow epoch I'd try removing these to make sure you don't mess them up in the material

It's other texture(cube after this changes)

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mellow epoch Aug 10, 2025, 1:28 PM

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bright halo It's other texture(cube after this changes)

Ok, so you can see the tesselation/displacement is working on the sphere

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Not entirely sure what's going on with the cube. Perhaps it doesn't have enough vertices. Or the height texture is not applied to it.

bright halo Aug 10, 2025, 1:30 PM

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It's the same material with same textures

mellow epoch Aug 10, 2025, 1:31 PM

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bright halo It's the same material with same textures

maybe try changing the tesselation factor. In fact, I'm not sure about the way you calculate it. Try setting a constant value exposed in the material parameters.

mellow epoch Aug 10, 2025, 1:32 PM

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bright halo If i turn on shaded wireframe

Looking at the wireframe here it does look pretty bad. If it was uniform/grid-like it would have been better, but if the toplogy is gonna be like that, you need more triangles.

bright halo Aug 10, 2025, 1:35 PM

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So, just find right triangle size?

mellow epoch Aug 10, 2025, 1:37 PM

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I think it might be some of the tesselation settings too. For example, "shape factor" seems to spherize the topology, which might not be desirable for a cube.
https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@17.3/manual/Tessellation.html

bright halo Aug 10, 2025, 1:41 PM

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But why if heightmap ok, it's so crooked

mellow epoch Aug 10, 2025, 1:42 PM

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bright halo

Set the shape to 0

bright halo Aug 10, 2025, 1:42 PM

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It's just getting smaller

mellow epoch Aug 10, 2025, 1:43 PM

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bright halo

Seems like the displacement is fcked up

bright halo Aug 10, 2025, 1:44 PM

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mellow epoch Aug 10, 2025, 1:44 PM

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bright halo

Set LOD to 0.

bright halo Aug 10, 2025, 1:44 PM

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mellow epoch Set LOD to 0.

No changes

mellow epoch Aug 10, 2025, 1:45 PM

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And get rid of this bullshit

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Start simpler.

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There are so many factors that could be breaking stuff

bright halo Aug 10, 2025, 1:48 PM

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Connected just DisplacementMultiply, and it's broked now, so this part is ok

mellow epoch Aug 10, 2025, 1:49 PM

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broked?

bright halo Aug 10, 2025, 1:49 PM

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Just changing texture position

mellow epoch Aug 10, 2025, 1:50 PM

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Changing how?

bright halo Aug 10, 2025, 1:52 PM

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Just texture, no mesh changing. If get closer it's disappeard

mellow epoch Aug 10, 2025, 1:53 PM

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Well, that doesn't sound correct, though it's hard to say without seeing it.

bright halo Aug 10, 2025, 1:56 PM

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If i get closer - 3rd image

mellow epoch Aug 10, 2025, 1:57 PM

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So it displaces the whole face? What does the wireframe look like?

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What does the shader look like at this point?

bright halo Aug 10, 2025, 1:57 PM

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If i set 1,1,1 to version before

bright halo Aug 10, 2025, 1:58 PM

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mellow epoch So it displaces the whole face? What does the wireframe look like?

mellow epoch Aug 10, 2025, 2:01 PM

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bright halo

What's does the shader look like at this point? What are the material settings at this point?

bright halo Aug 10, 2025, 2:02 PM

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mellow epoch Aug 10, 2025, 2:03 PM

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Again, set shape factor to 0

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And share what the shader looks like.

bright halo Aug 10, 2025, 2:03 PM

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mellow epoch Aug 10, 2025, 2:04 PM

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This is not the shader.

bright halo Aug 10, 2025, 2:05 PM

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bright halo

Wdym? Like this?

mellow epoch Aug 10, 2025, 2:06 PM

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The shader graph.

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Like this:
#1403785533007597568 message

bright halo Aug 10, 2025, 2:07 PM

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mellow epoch Aug 10, 2025, 2:12 PM

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bright halo

Connect the final displacement back, make sure that vector normal is set to object space, make sure the LOD is set to 0.

bright halo Aug 10, 2025, 2:14 PM

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For TessellationFactor Normal Vector and View Direction to object space too?

mellow epoch Aug 10, 2025, 2:15 PM

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bright halo For TessellationFactor Normal Vector and View Direction to object space too?

These don't matter right now as you connect the tessellation factor property directly. Keep it that way.

bright halo Aug 10, 2025, 2:17 PM

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This to tessellation displacement

mellow epoch Aug 10, 2025, 2:18 PM

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Is the height map not assigned?

bright halo Aug 10, 2025, 2:18 PM

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Just normal vector * multiplier

mellow epoch Aug 10, 2025, 2:19 PM

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Well, that's not what I suggested.

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I realized this I didn't attach this image earlier...

bright halo Aug 10, 2025, 2:21 PM

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1,1,1 here's

mellow epoch Aug 10, 2025, 2:21 PM

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Try making the triangle size smaller

bright halo Aug 10, 2025, 2:23 PM

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Already

mellow epoch Aug 10, 2025, 2:24 PM

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Then increase the tesselation factor to something like 30. And decrease displacement multiply to 0.2, so that it's not making such drastic changes.

bright halo Aug 10, 2025, 2:25 PM

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mellow epoch Aug 10, 2025, 2:26 PM

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Okay... Can you assign the height map to the albedo/base color as well? I want to see if the displacement is aligned with the heightmap.

bright halo Aug 10, 2025, 2:27 PM

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mellow epoch Aug 10, 2025, 2:27 PM

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Hmm... Doesn't seem to be aligned at all

bright halo Aug 10, 2025, 2:28 PM

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Yeah...

mellow epoch Aug 10, 2025, 2:28 PM

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Can you apply just the uv channel to the base color?

bright halo Aug 10, 2025, 2:29 PM

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mellow epoch Aug 10, 2025, 2:30 PM

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No no. I mean sample the texture with uv0

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Disconnect the uv input on the base color texture sample

bright halo Aug 10, 2025, 2:33 PM

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mellow epoch Aug 10, 2025, 2:33 PM

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Hmm... Still does not align at all... Are you sure the same texture is applied to the hight map?

bright halo Aug 10, 2025, 2:35 PM

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Sure

mellow epoch Aug 10, 2025, 2:36 PM

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Okay.
I'm off to sleep now. Will try it out myself in the morning.

bright halo Aug 10, 2025, 2:36 PM

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Okay, good night

bright halo Aug 11, 2025, 3:12 AM

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Hi, new thoughts?

mellow epoch Aug 11, 2025, 3:23 AM

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Yes. So, basically, it's a combination of issues:

tesselation having a limit on the amount of triangles.
tesselation producing a non inoform grid topology.

You can see in the screenshots with max tesselation, there are many triangles that overlap crevices and vertices not aligning with where the displacement should have the most effect. Thinking about it, it's totally normal for tesselation, as it's based on triangles and not quads.

bright halo Aug 11, 2025, 4:21 AM

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mellow epoch Yes. So, basically, it's a combination of issues: - tesselation having a limit o...

So, no way to ensure 3d like texture, that will go beyond the object's boundaries fully?

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I mean like bricks, that will complete each other on sides edges

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Like this

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Or this

mellow epoch Aug 11, 2025, 4:36 AM

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Yeah, not really. It doesn't seem like tessellation is good for this situation. It would be a kit easier to create a custom high poly mesh in blender instead.

bright halo Aug 11, 2025, 4:37 AM

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what about for cube, not the mesh

mellow epoch Aug 11, 2025, 5:04 AM

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Cube is a mesh

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It's just a very simple one.

bright halo Aug 11, 2025, 9:14 AM

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i know

bright halo Aug 11, 2025, 9:14 AM

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bright halo Or this

So... Any way to got shader for effect like this?

solemn summit Aug 11, 2025, 9:24 AM

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The closest you'll get is indeed a tesselation shader, with a high tesselation factor (to have enough mesh density).
But with a simple cube mesh you'll probably end with holes in the corners because the geometry is pushed in two different directions.
You could make some more complex solutions to cover the holes there by warping the tesselation offset, but it might distording the UVs ...

The easiest workaround is to use a flat plane with tesselation for most of the wall, but a dedicated geometry to cover up the corners.

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You can also use the less expensive POM effect in the pixel shader for the flat part.

mellow epoch Aug 11, 2025, 12:29 PM

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Yeah, to put it simply, there's not enough triangles for the topology of that heightmap. Here I've maxed the tessellation and changed the texture tiling to 0.2 and it looks okayish, but there is still an issue at the edges just like Remmy pointed out.
Besides, that much tesselation(6x the recommended max value), would probably kill performance entirely in a little bit more complicated scene.
If you want an image like the one you shared(#1403785533007597568 message), the best approach would be to make a custom mesh for it. No one does it via tessellation. It's simply an overkill for something that can be achieved so easily with other means.

#How to use POM Shader Graph for more realistic