Summary
In Unreal 5.8.2, I’m finding clothing physics seems to flicker on and off while I’m using this video recording plugin ( MSC Screen & Camera Recorder | Fab ). Video is attached.
This did not happen in UE 5.7.4, the cloth behaved as expected in older engine versions.
The plugin works by recording jpeg snapshots from a SceneCaptureComponent2D at runtime, and then merging them afterwards into a video. The flickering issue happens during the recording. I believe the recording process is CPU-bound by the jpeg files being written to disk. Recording does result in a noticeable drop in performance (goes from 60fps to about 40fps during recording)
I’m not sure if this issue can also occur in other instances where performance is slowed down by something else.
I’ve contacted the plugin developer about this already, but want to raise it here as well.
[EDIT]
Solved? Whilst I was debugging the issue, I discovered that this setting fixes the flickering during recording.
“p.ClothPhysics.WaitForParallelClothTask 1”
What Type of Bug are you experiencing?
Other
Steps to Reproduce
- Put a character with clothing physics in a scene with assets.
- Use the MSC Recorder plugin (or could try something else that slows down performance)
- Observe the cloth flickering.
Expected Result
Expect cloth to behave normally, as it did in previous engine versions.
Observed Result
Cloth seems to flicker between being stiff and simulated.
Affects Versions
5.8
Platform(s)
Windows