I have an example of two planes near each other, the intersection looks normal, but when there is post-processing, the intersection looks hatched in a different way according to the OS and the navigator.
The effect is directly linked to the camera near and far values.
For now, I only see this issue on macOS on some navigators.
The difference I see between each WebGL report (WebGL Report) is the Framebuffer Max Samples.
When there is the issue, the Framebuffer Max Samples is 4. And 8 when all is fine. But in some case on mobile phone, it’s 4 and the render is still fine so… I really don’t know.
Edit : When I disable the shader pass, there is no issue, so it might be a wrong parameter in the ShaderPass. I investigate on it.