Reducing Collider Mesh

This is one of the methods to create a custom reduced collider mesh using Autodesk Maya.

Video tutorial: Reducing collider mesh for UE cloth simulation 

1. Export FBX from UE with LOD’s option selected.
   
   
   
   
2. Import FBX file into Maya.
3. Remove all unused LOD’s from the original mesh (Mesh0)
4. Optionally, disconnect LOD visibility node.
   
   
   
   
5. Duplicate Mesh0 to create a new Mesh2 to modify.
6. Unlock Mesh2 and unparent
7. Hide Mesh0
8. Specific to MetaHumans:
1. For the Face: separate Mesh2 and delete unwanted components (eyeballs, eyelashes, mouth, etc.)
2. Merge Mesh2.
9. Modify and reduce Mesh2 as required.
10. Cleanup Mesh2
11. Select Hierarchy for the entire skeleton
12. With skeleton hierarchy selected, select Mesh2
13. For the Rigging option selected, select Skin – Bind Skin menu command with these options
    
    
    
    
14. Select both Mesh0 and Mesh2 
15. Select Skin – Copy Skin Weights menu command with these options
    
    
    
    
16. Select the skeleton (root) and Mesh2 
17. From the menu, select File – Export Selected and export your reduced FBX file
18. Import the new FBX file into UE and select corresponding skeleton for your character mesh. E.g., if you’re using a MetaHuman character select
19. Face_Architype_Skeleton – for the face, or
20. metahuman_base_skel – for the body. e.g.
    
    
    
    
21. Add your reduced meshed to their collider slots.