Adding an array modifier on one object changes appearance of a different object in cycles rendered view #84434

New Issue

Wouter Stomp · 2021-01-05T22:25:40+01:00

Wouter Stomp commented

2021-01-05 22:25:40 +01:00

System Information
Operating system: Darwin-20.2.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 5500M OpenGL Engine ATI Technologies Inc. 4.1 ATI-4.2.13

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-03 01:04, hash: 1e8f266591
Worked: unknown

Short description of error
Adding an array affects the appearance of a different object in rendered view.

Exact steps for others to reproduce the error
In Cycles - rendered view
have two objects with different materials, add an array modifier to one of them
one of the objects changes color

It seems to happen only when adding the array to the last added object?

See movie and attached blend file:

Schermopname 2021-01-05 om 22.13.13.mov

Material bug.blend

**System Information** Operating system: Darwin-20.2.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 5500M OpenGL Engine ATI Technologies Inc. 4.1 ATI-4.2.13 **Blender Version** Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-03 01:04, hash: `1e8f266591` Worked: unknown **Short description of error** Adding an array affects the appearance of a different object in rendered view. **Exact steps for others to reproduce the error** In Cycles - rendered view have two objects with different materials, add an array modifier to one of them one of the objects changes color It seems to happen only when adding the array to the last added object? See movie and attached blend file: [Schermopname 2021-01-05 om 22.13.13.mov](https://archive.blender.org/developer/F9551890/Schermopname_2021-01-05_om_22.13.13.mov) [Material bug.blend](https://archive.blender.org/developer/F9551898/Material_bug.blend)

Wouter Stomp commented

2021-01-05 22:25:40 +01:00

Added subscriber: @blenderrocket

Wouter Stomp commented

2021-01-05 22:31:45 +01:00

Simplest case is just adding a second cube to the default scene and then adding an array.

Furthermore when I then delete the object that causes the problem to appear, Blender instantly crashes. If I first delete the other object, it is no problem.
Crash log:
Material bug crash.txt

Simplest case is just adding a second cube to the default scene and then adding an array. Furthermore when I then delete the object that causes the problem to appear, Blender instantly crashes. If I first delete the other object, it is no problem. Crash log: [Material bug crash.txt](https://archive.blender.org/developer/F9551905/Material_bug_crash.txt)

Wouter Stomp commented

2021-01-05 22:34:33 +01:00

The crash is triggered even more easily by just duplicating the default cube and then deleting it (happens only in cycles rendered view).

Evan Wilson commented

2021-01-06 09:13:08 +01:00

Added subscriber: @EAW

Evan Wilson commented

2021-01-06 09:13:08 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Evan Wilson commented

2021-01-06 09:13:08 +01:00

Thank you for the report.

I cannot reproduce the issue using 2.92.0 Alpha, branch: master, commit date: 2021-01-05 20:21, hash: 5424b4821d

I suspect that 166c0db3f9 might have fixed this issue. Your crash text looks similar to ones I had previously due to the bvh not getting updated properly.

Can you try using the latest daily build from https://builder.blender.org/download/? It has 166c0db3f9.

Tested using:
OS: Windows-10-10.0.19041.630-SP0 64 Bits
GPU: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35
CPU: i7-950 @3.07 GHz SSE2 SSE3 SSE41
RAM: 8.00 GB

Thank you for the report. I cannot reproduce the issue using 2.92.0 Alpha, branch: master, commit date: 2021-01-05 20:21, hash: 5424b4821d28 I suspect that 166c0db3f9 might have fixed this issue. Your crash text looks similar to ones I had previously due to the bvh not getting updated properly. Can you try using the latest daily build from https://builder.blender.org/download/? It has 166c0db3f9. --- Tested using: OS: Windows-10-10.0.19041.630-SP0 64 Bits GPU: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35 CPU: i7-950 @3.07 GHz SSE2 SSE3 SSE41 RAM: 8.00 GB

Wouter Stomp commented

2021-01-06 20:28:57 +01:00

Indeed both problems are fixed in the latest build, thanks!

Wouter Stomp commented

2021-01-06 20:29:16 +01:00

Changed status from 'Needs User Info' to: 'Resolved'

Wouter Stomp closed this issue

2021-01-06 20:29:16 +01:00

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Adding an array modifier on one object changes appearance of a different object in cycles rendered view #84434