Stencil Buffer

Development Rendering
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1

I’m trying to implement Alex Vlachos very clever technique of using a stencil mesh to write in the stencil buffer to save precious GPU cycles in my VR game. I’ve already done a lot of optimization to try and optimize fillrate for my game but this seems like the ideal solution to save a huge amount.

Here is the link of the technique for more info:

The whole thing is interesting but the technique I’m talking about is on slide 59.

However, I’m at a loss on how to write in the stencil buffer in UE4. I’ve been searching RHI commands and found some related to the stencil buffer but I don’t know exactly where to start to try and implement that.

If anyone can give me an hand that would be greatly appreciated.

Thanks!

Mick

2

Also, would that still be coherent with Time Warping ? Maybe not using a perfect-fit stencil mesh would work better?

3

Bump? Anyone? Epic?

4

I dare bump again :slight_smile:

6

Thanks, I’ll give this a try next week and let you know how it went!

7

Hi :

I need to render character vision bubbles on screen, and the bubbles may be partially displayed. Can you provide more details about using Stencil buffer with C++?

The following information would do big help:
- What class should I inherit while adding code to the project
- A block of code sample

Thanks

8

Just talked with Zak. Unfortunately, Unreal doesn’t support he feature I expected now. Will wait and see.