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Camera lag with Auto Depth turned on
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System Information
Operating system: Windows 10 (1809)
Graphics card: GTX 1070

Blender Version
2.80, 532536bf52da, beta, 2019-03-27

Short description of error
I am experiencing a lag in camera movement while sculpting with activated Auto Depth. With Auto Depth active there is a lag by about one second until Blender reacts to my camera movements. With Auto Depth turned off the lag is gone. This behavior only occurres on denser meshes (about 2 million polys in this case).
I can reproduce the same lag on Windows with NVIDIA Graphis (GTX 1070) as on a Mac Pro with AMD Graphics (RX 580).

Here is also a screen capture to illustrate the problem.{F6892502}



Event Timeline

Not sure if this can be considered a bug.

With Auto Depth a bunch of extra things have to be done (drawing ZBuff etc.) which might eat some performance on highres geometry...
Would ask @Campbell Barton (campbellbarton) (maybe @Clément Foucault (fclem), @Brecht Van Lommel (brecht) as well?) if there is room for improvement here?

There is no lag with the same scene in 2.79 with or without Auto Depth. Also I notice much lower viewport performance (fps) in 2.80 compared to 2.79.

Let's first fix T60043: macOS viewport lagging and then see what the performance looks like for the various settings.

Wait, I confused this with another report..

Brecht Van Lommel (brecht) triaged this task as Needs Information from User priority.May 21 2019, 11:21 AM

To me this kind of excessive lagging definitely sounds like a bug.

@Oliver Harries (olyandros), there have been recent changes in drawing of the depth buffer, could you verify if it's still an issue?

Demeter Dzadik (Mets) closed this task as Archived.
Demeter Dzadik (Mets) claimed this task.

Closing because no info in over a week. Feel free to reopen.