Visual anomalies on macOS

[TheNoswad]

When running on macOS Metal, there is a severe flickering of black stripes on meshes. This problem appears to have started after #314

My specs

• macOS Catalina 10.15.7
• 1.6 GHz Dual-Core Intel Core i5
• Intel HD Graphics 6000 1536 MB

Attached is a video of the scene-viewer example exhibiting the issue.

Screen.Recording.2022-01-07.at.9.09.48.AM.mov

[cwfitzgerald]

My guess is this is either a bug in wgpu/naga or a driver bug. It may also be mad at my negative shadow biases, but that would be super strange to me.

[cwfitzgerald]

Took a look at the generated MSL for the new shadow shader and nothing looks terribly amiss.

[cwfitzgerald]

This is fixed, just needs to be backported to wgpu 0.12. Marking as a blocker for release.

[cwfitzgerald]

Fix published in wgpu, closing.

[cwfitzgerald]

Unfortunately opening this back up, still happens on an M1

[cwfitzgerald]

Fix is in the works

[cwfitzgerald]

So this now works on MacOS 11+ and iOS 14+, need to follow up with bigger hammers for previous OSs.