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Cycles zoom laggy with renderborder
Open, Confirmed, LowPublic

Description

System Information
Operating system:
Graphics card:

Blender Version
2.80, 6fd11a21f5c5

Short description of error
Ctrl + Middle mouse zoom in viewport while rendering cycles is really laggy while renderborder is used. (Problem only occurs while camera is activated)

Tested this in several scenes, seems like this behavior started with 2.8

Details

Type
Bug

Event Timeline

Sebastian Parborg (zeddb) triaged this task as Confirmed, Medium priority.

In 2.8 this seems to stall the viewport when refreshing the cycles render. In 2.79 only the content in the render border lagged behind.
@Brecht Van Lommel (brecht) bug or not?

Brecht Van Lommel (brecht) lowered the priority of this task from Confirmed, Medium to Confirmed, Low.Mar 13 2019, 2:18 PM

Worth investigating where this comes from, even if it's not high priority.

I also noticed, that cycles in viewport was much smoother with 2.79. Looks and feels like the refresh rate has changed.
Maybe this is also the reason for the camera zoom lag.