How to create concave(complex,polysoup...) custom collision

How can I create concave (not convex) custom collision for my static mesh?

I could use the render mesh by choosing “use complex as simple” option. But I don’t want to use the render mesh, I want to create different, custom geometry for collision.

If I create UCX_ collision pieces, they must be convex or they won’t even import.

Is there any way to import custom “complex” collision, or assign collision from another static mesh, maybe with a blueprint?

I believe, there is no such functionality. Intended plan of actions for this case is to decompose your concave collision using only convex hulls by using automatic collision generation or by importing UCX convex hulls.

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