Overlays ( Face orientation, weight maps etc ) z-fight with underlying mesh #90030

New Issue

Mathias Nordskog · 2021-07-21T23:10:29+02:00

Mathias Nordskog commented

2021-07-21 23:10:29 +02:00

Edit: This appears to be a duplicate of https://developer.blender.org/T87927

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: AMD Radeon RX 6800 XT ATI Technologies Inc. 4.5.14741 Core Profile Context 21.7.1 27.20.22017.1004

Blender Version
Broken: version:

2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7
2.83.17 Release Candidate, branch: master, commit date: 2021-06-30 07:01, hash: c5c4727d6e
2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: 0330d1af29
2.93.2 Release Candidate, branch: master, commit date: 2021-07-07 05:52, hash: 9e64fd461a.
3.0.0 Alpha, branch: master, commit date: 2021-07-20 21:39, hash: dc8a924efa
Worked:
2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca

Short description of error
Overlays such as face orientation and weight maps will flicker as if z-fighting.
The overlays appear to be z-fighting with the "normal" rendered surface of the mesh.

Exact steps for others to reproduce the error
Open an new project and delete the default cube. The problem is not visible on the default cube unless it is rotated first.
Create a UV sphere, then enable the "face orientation" overlay.
The flickering z-fighting will become very apparently as soon as the view is rotated.

Details

blender_debug_output.txt

blender_system_info.txt

Launching Blender using blender_debug_gpu_glitchworkaround.cmd does not resolve the issue.

When running 2.93 blender.exe with --debug-gpu I also get the following output:

WARN (gpu.shader): OVERLAY_shader_armature_sphere_410 FragShader:
      |
    6 | #extension GL_ARB_shader_draw_parameters : enable
      |  ^
      | Warning: (#62) enable/warn/disable extension is not found. Extension "GL_ARB_conservative_depth" is not supported

WARN (gpu.shader): OVERLAY_shader_armature_sphere_397 FragShader:
      |
    6 | #extension GL_ARB_shader_draw_parameters : enable
      |  ^
      | Warning: (#62) enable/warn/disable extension is not found. Extension "GL_ARB_conservative_depth" is not supported

WARN (gpu.shader): OVERLAY_shader_armature_shape_435 GeomShader:
      |
    5 | #endif
      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ^
      | Warning: (#310) Inputs that are integers should be qualified with the interpolation qualifier "flat"

Edit: This appears to be a duplicate of https://developer.blender.org/T87927 **System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: AMD Radeon RX 6800 XT ATI Technologies Inc. 4.5.14741 Core Profile Context 21.7.1 27.20.22017.1004 **Blender Version** Broken: version: - 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` - 2.83.17 Release Candidate, branch: master, commit date: 2021-06-30 07:01, hash: `c5c4727d6e` - 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: `0330d1af29` - 2.93.2 Release Candidate, branch: master, commit date: 2021-07-07 05:52, hash: `9e64fd461a`. - 3.0.0 Alpha, branch: master, commit date: 2021-07-20 21:39, hash: `dc8a924efa` Worked: - 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` **Short description of error** Overlays such as face orientation and weight maps will flicker as if z-fighting. The overlays appear to be z-fighting with the "normal" rendered surface of the mesh. **Exact steps for others to reproduce the error** Open an new project and delete the default cube. The problem is not visible on the default cube unless it is rotated first. Create a UV sphere, then enable the "face orientation" overlay. The flickering z-fighting will become very apparently as soon as the view is rotated. **Details** [blender_debug_output.txt](https://archive.blender.org/developer/F10232472/blender_debug_output.txt) [blender_system_info.txt](https://archive.blender.org/developer/F10232473/blender_system_info.txt) Launching Blender using blender_debug_gpu_glitchworkaround.cmd does not resolve the issue. When running 2.93 blender.exe with --debug-gpu I also get the following output: ``` WARN (gpu.shader): OVERLAY_shader_armature_sphere_410 FragShader: | 6 | #extension GL_ARB_shader_draw_parameters : enable | ^ | Warning: (#62) enable/warn/disable extension is not found. Extension "GL_ARB_conservative_depth" is not supported WARN (gpu.shader): OVERLAY_shader_armature_sphere_397 FragShader: | 6 | #extension GL_ARB_shader_draw_parameters : enable | ^ | Warning: (#62) enable/warn/disable extension is not found. Extension "GL_ARB_conservative_depth" is not supported WARN (gpu.shader): OVERLAY_shader_armature_shape_435 GeomShader: | 5 | #endif | ^ | Warning: (#310) Inputs that are integers should be qualified with the interpolation qualifier "flat" ``` ![face_orientation_zfighting.PNG](https://archive.blender.org/developer/F10232489/face_orientation_zfighting.PNG) ![weight_map_zfighting.PNG](https://archive.blender.org/developer/F10232491/weight_map_zfighting.PNG)

Mathias Nordskog commented

2021-07-21 23:10:29 +02:00

Added subscriber: @Roughy-4

Pratik Borhade commented

2021-07-22 03:07:30 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-07-22 03:07:30 +02:00

This appears to be a duplicate of https://developer.blender.org/T87927

Thanks for the report. yes, it's duplicate of #87927. I will merge this report :)

>This appears to be a duplicate of https://developer.blender.org/T87927 Thanks for the report. yes, it's duplicate of #87927. I will merge this report :)

Pratik Borhade commented

2021-07-22 03:07:53 +02:00

Closed as duplicate of #87927

Pratik Borhade closed this issue

2021-07-22 03:07:53 +02:00

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Overlays ( Face orientation, weight maps etc ) z-fight with underlying mesh #90030