Use of .read in fragment function for MTLTexture

[caroline]

I suspect this is the issue where I hard-coded the scaling.

Does this fix your issue?

Question about input coordinates in fragment shader

Looks like I took the easy way out . x2 is the scale factor of the screen, and the Pro Max has a scale factor of 3. This is the fixed final sample. The changes are: Common.h - add this to Params: uint scaleFactor; Add this to Renderer.init(metalView:options:): #if os(macOS) params.scaleFactor = uint(NSScreen.main?.backingScaleFactor ?? 1) #elseif os(iOS) params.scaleFactor = uint(UIScreen.main.scale) #else params.scaleFactor = 1 #endif In PBR.metal, change coord: …

If not, perhaps you could give me more details of your device, GPU, operating system, and even your zipped-up code?