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When loading an existing project on startup, compositor doesn't show backdrop
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I'm running the latest daily Blender 2.80 on Windows 10 x64.

Steps to reproduce:

  1. Start Blender.
  2. The splash screen offers a couple of "recent projects".
  3. Select a project.
  4. The project opens in the last mode, which is the "Compositor". I was editing a movie clip previously there and had the backdrop enabled (before I saved the project).
  5. The backdrop is missing and does not appear automatically.
  6. Scrubbing the timeline would cause the backdrop to appear.

See attached screenshot where the backdrop is missing.


  • TR



Event Timeline

Tzvi (zvi8) updated the task description. (Show Details)Jul 26 2019, 6:15 AM

Is this something that worked before? When I load compositing projects (even in 2.79) I've always had to F12...

Well, it's a static movie clip node that requires no render, all the information is always available at startup without the need to render anything, so I would expect to see it.
And merely scrubbing the timeline would redraw it anyhow, without a need to F12.

Jacques Lucke (JacquesLucke) claimed this task.

It does have to compute the compositing node tree. I don't think this is a bug.
It could be a feature to render the final image when the file is loaded, but I'm not sure if this is desirable.