Physics/Chaos Cache Playback Bug?

Stoney Maroney
Thu, 28 Nov 2024 18:04:38 +0000
World Creation

Hello!

Im not sure if this is intended or not so thats why I didnt add a Bug report tag to this.

Im running Unreal 5.4

But im currently working on a VR project that is using the VRExpansionPlugin. Im needing to destroy a quite large asset (A church, yes its all one geometry collection, yes I shouldve done this in houdini, its a learning objective of mine to do it in chaos). In hindsight I should have segmented the mesh based on the multiple stages which I will probably do anyways but im curious if there is a way to control this better.

Im really happy with how far its come destruction and physics wise, and now when I want to bake it with a CacheManager and put it in a sequencer, it doesn’t include the pauses i have between destruction phases.

I did a quick demo video to better show the issue I am facing.

UnrealEngine 5.4 Chaos Cache playback bug?

Basically, I want to have some pauses in between the destruction. I thought that it would just play out the destruction as it happend in play mode (which is why i thought you had to do it in play mode).

However when played back, no matter how long I wait in between the first corner chip and me smashing the wall into it, it just plays all at once with no pause.

In the sequencer I put the start and end time appropriately (0 sec is 0 and 30 sec is 30, I know that this value doesnt stay accurate throughout) and even when i play around with the values and extra keys to the start time and get very into timing it all nicely speeding it up and down, no matter what, I can’t get the pause I want.

The first part of the demo is quite extreme but i think it shows the problem the best. The second part of that video shows my second problem a bit better, and thats with a lot of the geomtry just kinda warping? or like being “sucked” into their positions rather than playing out the actual physics simulation that was “recorded”. I thought it could maybe be the masterfield but its all directional and you can see the arrows.

Is there any way to get my desired simulation that I record in play mode? Is this intended? Please Help!!

Also let me know any other images or videos I could provide that would help! (Though I cant upload images directly yet )

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