Physics/Cloth passing through collision Object?

Support Particles and Physics Simulations
1

Why is the cloth simulation going through the collision object (the pants and self collision are enabled)?

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Thanks
Sean

2

Any suggestion to fix this issue? Thanks

3

Have you tried adjusting the Object Collision distance? Also, if all else fails, duplicate the Collision area, scale it a little larger, make it invisible and non-renderable, and use that for your collisions.

4

Doesn’t it collide at all, or just intersects a small distance?

If it is the former, it would be easier figured out with a blend file. If it is the latter, what @markholley said, and also you may want to subdivide a little bit finer. It makes sense to keep the sim mesh coarse, but a bit smaller faces could help with intersections, as only the vertices collide.