Raytracing with concave objects

[amirishere]

I am planning to do ray tracing with concave objects and wanted to know which approach would be faster:
1) Decomposing into convex meshes.
2) Using bsp maps. Is that possible with ray tracing?
3) Using the convex meshes themselves. ie btBvhTriangleMesh ... I think?
4) Any other proposed method.

[Murphy]

I just use the convex mesh (btBvhTriangleMeshShape) and the speed of casting rays seems fast enough.

[amirishere]

Ok I had confined myself to the raycast demo where the bullet internals are used to do raycasting without looking at other possibilities. After your comment I went and had another look and found the btCollisionWorld::ClosestRayResultCallback.
Thanks
Lets go and see what this has in store.