Viewport glitches when using Metal backend #109389

New Issue

Tom Oliver · 2023-06-26T22:08:06+02:00

Tom Oliver commented

2023-06-26 22:08:06 +02:00

System Information
Operating system: macOS-13.4.1-arm64-arm-64bit 64 Bits
Graphics card: Apple M1 Pro Apple 4.1 Metal - 83.1

Blender Version
Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: e1ccd9d4a1d3
Worked: (newest version of Blender that worked as expected)

Short description of error
Using the Metal backend on macOS (at least on an M1 Air and M1 Pro machine, all I have access to) causes visual glitches in the viewport. Most notably issues in the texture paint view when enabling Paint Mask where the mask itself is full of glitching noise. There was also one instance where trying to texture paint caused the entire system to crash.

Another issue is with bone visibility while in pose mode and bones set to "Stick", there's a thick outline that prevents the actual colors of the bones so you can see if they're affect by a constraint.

Exact steps for others to reproduce the error

For the bone issue: Simply go into pose mode with an armature at set the viewport display to stick. The outline of the bone will be too thick to see the color indicators. (same as #108575)
For the mask issue: simply enter texture paint mode and enable paint mask and deselect everything, the resulting mask with be garbled.

Both of these issues only occur with the Metal backend, switching to OpenGL and restarting Blender has the expected behavior. In addition, these issues for me were instantly reproducible on both the 3.6 and 4.0 builds as well.

Attached video shows OpenGL behavior vs Metal. I didn't include a blend file because just the default cube when loading up will showcase these issues.

**System Information** Operating system: macOS-13.4.1-arm64-arm-64bit 64 Bits Graphics card: Apple M1 Pro Apple 4.1 Metal - 83.1 **Blender Version** Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: `e1ccd9d4a1d3` Worked: (newest version of Blender that worked as expected) **Short description of error** Using the Metal backend on macOS (at least on an M1 Air and M1 Pro machine, all I have access to) causes visual glitches in the viewport. Most notably issues in the texture paint view when enabling Paint Mask where the mask itself is full of glitching noise. There was also one instance where trying to texture paint caused the entire system to crash. Another issue is with bone visibility while in pose mode and bones set to "Stick", there's a thick outline that prevents the actual colors of the bones so you can see if they're affect by a constraint. **Exact steps for others to reproduce the error** 1. For the bone issue: Simply go into pose mode with an armature at set the viewport display to stick. The outline of the bone will be too thick to see the color indicators. (same as #108575) 2. For the mask issue: simply enter texture paint mode and enable paint mask and deselect everything, the resulting mask with be garbled. Both of these issues only occur with the Metal backend, switching to OpenGL and restarting Blender has the expected behavior. In addition, these issues for me were instantly reproducible on both the 3.6 and 4.0 builds as well. Attached video shows OpenGL behavior vs Metal. I didn't include a blend file because just the default cube when loading up will showcase these issues.

yikes.mov

30 MiB

Tom Oliver added the

labels 2023-06-26 22:08:06 +02:00

YimingWu added the