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Render Preview disappears
Closed, InvalidPublic


System Information
Operating system: Microsoft Windows 7 Ultimate, Version 6.1.7601, Service Pack 1, Build 7601
GPU: ASUS Strix Radeon Vega 64
CPU: Intel(R) Core(TM) i7-5960X
RAM: 32.0 GB
Full System Information: Here
Blender Version

2.80, 29 December, 01:07:02 -7c438e5366b2-


Short description of error

When rendering a video in the VSE the preview window goes blank upon interaction.

Exact steps for others to reproduce the error

  • Render Animation
  • Interact with render preview

Event Timeline

Richard Antalik (ISS) lowered the priority of this task from 90 to 50.

I have noticed, that when you create new file from video editing template, render result is shown in new window, sequencer drawing code is not executed.

I think, that updating sequencer preview can be useful, but I don't know, what was the intention. Blame is heavily segmented..

Richard Antalik (ISS) changed the task status from Unknown Status to Unknown Status.Jun 2 2019, 12:26 AM

I remember this working in 2.79.

However once again I looked at history in code, and this should be the same behavior for 10 years or so.
Checked once again in 2.79, sequencer preview goes blank.

In any case, this is by design - thread safety.