How to access the Stencil Buffer using C++? [Portals]

[DennG]

@zalo;439052

You don’t need a stencil buffer, you just need to use ScreenAlignedUVs on the portal’s material.

Check out my example here: n00b question regarding post-process portal effect - Rendering - Epic Developer Community Forums

I go a step further, using a SceneCapture2D that matches the main viewport resolution and then mapping that RenderTarget to the portal using the Pixel-Perfect variant of the ScreenAlignedUVs node.

If your post process quality is turned all the way down (don’t know why it interferes in 4.9), you shouldn’t be able to detect the transition (well, I couldn’t using the stock FPS character controllers).

Thanks for pointing me to this thread.
I actually experimented with CustomDepth and CustomStencil but I never had the idea to put it on the actual mesh.

Also thanks for uploading your solution.
I’ll try it later and report back then!