2d concave collision shapes

[marios]

is this possible to create in bullet engine, concave 2d static collision object? I have tried with btBvhTriangleMeshShape with z-coordinate = 0, but box2dshape don't collide with it. btConvex2dShape works fine, but it would be great to create concave. Any ideas?

[Erwin Coumans]

For concave 2D shapes it is recommended to do convex decomposition, and store multiple btConvex2dShape in a btCompoundShape.

Thanks,
Erwin