Geometry is completely broken and unusable in Viewport #79228
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Reference: blender/blender#79228
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System Information
Operating system: Windows-10-10.0.20175-SP0 64 Bits
Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.48
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-07-23 22:35, hash:
698af2e774Worked: (newest version of Blender that worked as expected)
Short description of error
I opened a file i created almost a year ago. The geometry appears to be completely broken, and displays heavy artifacts. Changing the editing mode does not affect this. The model is still rendered correctly in Cycles.
When opening the original file, the issue appears on about two thirds of the time. When saving the file in the broken state, it appears to stay consistently.
Even after reloading all factory settings, this still happens.
Exact steps for others to reproduce the error
Opened a .blend file.
Blender_ [F__OneDrive_Projects_Active Projects_Bulletkin_Bulletkin03.blend] 2020-07-24 12-41-06.mp4
Bulletkin03_original.blend
Bulletkin03_broken.blend
Added subscriber: @Thane5
Added subscriber: @MarcinTwarowski
I can confirm that sometimes it's broken but not every time.
System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-07-23 22:35, hash:
698af2e774Also broken in:
2.90.0 Beta, branch: master, commit date: 2020-07-23 18:40, hash:
9cbf43801b2.90.0 Alpha, branch: master, commit date: 2020-07-12 09:05, hash:
f319eec881To reproduce it I quickly opened the file multiple times. It often just crashes, but sometimes produces this artefact. I recorded similar problem in 2.90 (second video) .
Added subscriber: @YAFU
I've also had this kind of problem a few times here on Linux with Blender from Master (GTX 960). I have not had time to investigate when exactly this occurs. When this happens I simply close blender and then open Blender again.
Added subscriber: @DaveStromberger
I saw this too after installing the latest built on July 24. After a system reboot, it was fine.
Added subscriber: @iss
I am unable to reproduce on
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.7.2 27.20.2001.9003
2.90.0 Beta, branch: master, commit date: 2020-07-27 20:19, hash:
221604cdd6Desktop 2020.07.28 - 10.33.47.04.mp4
Looks similar to https://developer.blender.org/T77910
I just tested it again with the most recent build, and it became even worse. Blender now instantly crashes after starting up, sometimes you can still see the broken mesh before it shuts down.
With yesterday's Windows build from the 2.90 Beta, everything seems fine now, but i'll test this file again from time to time to make sure this isn't an accident.
I tested:
Added subscriber: @RedMser
Added subscribers: @fclem, @lichtwerk
Thx @MarcinTwarowski keeping an eye on the duplicate reports.
Since #77910 (Sometimes the Viewport is damaged.) is the oldest (and @fclem is already involved), lets keep this as the central place to investigate this further (so will merge these reports)
Closed as duplicate of #77910