Offscreen rendering works only once #84402
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Reference: blender/blender#84402
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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 442.19
Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-04 23:35, hash:
9b17e71c23
Also broken: 2.91 release
Worked: 2.90 release
Short description of error
When doing more than one offscreen render per frame, it results in a blank output.
Exact steps for others to reproduce the error
Open attached .blend: bug.offscreenrendering_multiple.blend
Run the script
Move your mouse over the 3D view
Now you should see two perspectives of the default cube side-by-side like in 2.90:
But in 2.91 onwards the second perspective (the second offscreen render) is black:
Added subscriber: @GottfriedHofmann
Added subscriber: @dfelinto
Added subscriber: @rjg
Changed status from 'Needs Triage' to: 'Confirmed'
I can reproduce the problem and this also occurs when creating a second
GPUOffScreen
object for the second view.Added subscriber: @regcs
I can also reproduce. But seems to be related to the drawing of the offscreen texture to the SpaceView3D or some interaction with that. Because if we separate the offscreen drawing and the drawing of the offscreen buffers, it works:
Added subscriber: @ideasman42
Bisected to
c766d9b9dc
This issue was referenced by
ea01c8c5f6
Changed status from 'Confirmed' to: 'Resolved'