ViewportFrame staggered updates behaving unexpectedly

Bug Reports Engine Bugs
#1

Reproduction Steps
Working on creating a reproduction place for you atm.

Attached a gif in the meantime instead.

viewporterror3

Expected Behavior
This is not a complaint about staggered updates of viewportframes - I’m totally okay with that!
I’ve encountered a scenario where deleting, visible = false, or parent=nil, or not modifying models inside a viewportframe SHOULD restore performance, but is not.

Actual Behavior
The viewportframes stagger their updates when performance is bad, which is expected. What is unexpected is when I delete enough viewportframes that the staggering should not happen any more,
the staggering continues.

My “bug” is that this staggering/priority effect appears to be triggering far too aggressively, and/or is a not being updated as viewportframes are deleted/destroyed.

I’ve attached a gif of what I’m seeing - please take note of the smoothly rotating ui element in the top right… and the fact that there are only ** 8 viewportframes currently remaining in the entire game** with fairly simple meshes in each. The rest were deleted.

Workaround
No.

Issue Area: Engine
Issue Type: Display
Impact: High
Frequency: Constantly
Date First Experienced: 2021-11-01 00:11:00 (+10:00)
Date Last Experienced: 2021-11-29 00:11:00 (+10:00)
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#2

It’s hard to tell without reproducing it. What game is it? Is it public so I can take a look?
We always throttle updates. I guess your model might have too many parts? A general optimization is use less parts and rotate the camera instead of the model.
The fact that deleting it does not restore behavior looks more like a bug.

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#3

Unfortunately for me, my attempts to make a reproduction in a simple test place show the engine working correctly, so its something dumb my full-sized-game is doing that I have not isolated yet

I’ll come back to you once I can send you a test file…

(The models are single simple mesh parts, they just look blocky because of their surface appearances)

#4

sigh

Sorry folks,
seems it was just I’d had studio open for too long. Restarting studio fixed whatever it was, smooth as butter now.
(there goes 4 hours I wont get back)

1 Like
#5

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