Degenerate triangles in UI Toolkit

[finite galleon]

Hi, I'm having issues with degenerate triangles in UI Toolkit. I have a hunch it's my world space elements which use Shadergraph materials. I've tried to hunt down every divide by zero and NaN situation, but I'm still having moments where I get brief flashes of degenerate triangles.

#🧰┃ui-toolkit message

More so than finding a solution, can someone help me debug this? How do I set it up so that I can use a frame debugger to know exactly where it's coming from? That way I can narrow down the issue and patch the code that is causing this problem. Thanks!

if it helps, it's also happening on both Windows and MacOS (DirectX and Metal) and happening on both render scales (100% and 50%)

[tender remnant]

Can't you see it in the frame debugger as is? What kind of setup do you need? Just walk through the draw calls and find the first draw wel the issue appears.

[finite galleon]

how?

the frame debugger needs to be frame perfect, no?

can i somehow record every frame?

it only happens for a single frame

[tender remnant]

Yes. Can't you pause on a frame with the issue? How did you take the screenshot?

[finite galleon]

it's a video

no worries, answer is here: #🧰┃ui-toolkit message

[finite galleon]

it did not fix it

[vital steppe]

Frame debugger can step forward frame by frame, at least

[finite galleon]

it can, but for some reason i'm having a really tough time recreating this on a frame by frame basis

[tender remnant]

Then it sounds like a race condition. Are you using background threads(possibly via async) anywhere?

[finite galleon]

i will check