How to resolve hoodie string crazy-bouncing in MovieRender Queue?

My metahuman’s hoodie strings now bounce around like crazy the entire take! I expect they are colliding with the head-mesh collision after retargeting the skeleton but not sure.

My metahuman used to render OK, but after recording facial expressions with FaceLink I had the skeleton issue where the head is lowered into the body. I followed THIS tutorial to fix it by repointing the recorded take to what I believe is the correct skeleton, but now my hoodie strings jump around all the time when recording to Render Queue (but not viewport).

I have searched the forums and youtube but am at a loss :frowning: Kindly please help guide me.
Any tips are greatly appreciated! I’m new at this but not sure where to start.

Hi,
I was able to get much more stable MetaHuman hoodie strings using the ‘Enable Linear Projection’ checkbox in the hoodie physics asset. It needs to be enabled on every constraint:

  1. Select all bodies
    image
  2. Select all constraints (clicking and dragging a box select is easiest)
    image
  3. Check ‘Enable Linear Projection’
    image

I don’t know if this is best practice performance-wise, but for now it seems fine.
Hope that helps!

Even with this fix, the issue still happens upon changing hoodie LODs, it just resolves itself after a second instead of continuing on for awhile. For me, the solution I ended up settling on ended up being changing minimum LOD to 2 in the MetaHuman_Clothing_LODSettings file. While not ideal in every scenario, this ended up working fine for my project.

Thanks for sharing!

Oddly my strings stopped flying around when i turned OFF AA in the render settings. It makes no sense to me but renders worked after that. I did some compositing tricks to merge two different outputs as I needed the higher quality settings for the face. Not a pretty solution but hacked it on my end.

what is AA?

From the awesome Gabriel Paiva (his solution is for in editor, but I’ve had luck with it fixing issues in MRQ)