Important Question

[tender roost]

How did Homemade_Meal make this? I have been trying to figure out how the masking the viewport works, how they got the portals to look convincing, and all the rotations and stuff correct.

I wanna try and replicate how this looks so I can learn more about all this.

I watched this video about all this, but it looks like they got it so the view is the portals actual area, but I can't find anything that roblox lets you use to replicate this
https://www.youtube.com/watch?v=_SmPR5mvH7w&t=273s

the best I could guess is sizing the viewport frame to where it only shows the portal view, but then the issue is how would I calculate that?

[wide belfry]

viewport frames are pretty limited aren't they?

with the lighting and rendering capacity

that would probably create some problems for you if you use them but im not sure how else you would do it

did you see this post
https://devforum.roblox.com/t/re-creating-a-portal-effect/337159/46

[tender roost]

ill check it out and see what they did

[humble aurora]

i tried making portals a while ago, never could get the math right but did make a convincing effect

basically you want a viewport for a surface gui

and then you like do a shitload of math

[long hare]

egomoose's portal tech contains the viewport camera projection you need to make the cameras line up

[long hare]

I can assure you this is not nearly as useful or practical as it seems

this portal technique is uuuuuugllleeehhhh

problem being viewports don't have shadows or lighting, so they look really bad. that's without considering the pixelation problem up close

there's a whole host of other unsolved problems for portals in roblox

but the main one that just kills it is just how ugly it is because of the lack of lighting.

[long hare]

now you might be saying, "but pyro, there are shadows in tunnel, so how did they do that if there's no lighting?" yeah, that is baked lighting.

as in, it is baked into the map's textures.

lighting doesn't effect it since it is like a decal on the wall

[long hare]

viewports are the most reliable despite how ugly they are. the alternative is some really janky occlusion portals which just do not play well with roblox

and again suffer lighting problems

[long hare]

and that's all before the cloning shenanigans you have to do to make the viewports render properly: it is extremely expensive to run this in any roblox game.

[subtle bobcat]

These are viewports i can tell

[tender roost]

I dont really need to have the details like 1 to 1, the issue for me is the absurd amount of math that's required, since I'm still struggling on math

[long hare]

ya egomoose already released a version of the math

[long hare]

@tender roost 👍

[tender roost]

Thx, all I really need to do though is just code the walking through to be semi decent, I have a good idea on how to do it, but also I need to get the shape of the portal

[long hare]

egomoose's project has that too...

[tender roost]

I know but I wanna at least code something lol

[long hare]

and yeah it is unsolved. maybe you can possible do something with the new union operations on meshes but idk

you can get by with characters though

[long hare]

ya the code is linked in that thread, you're going to have to read it