I've had this type of problem on and off for a while now, but its reared its ugly head again today. I'm still on H11.1.388.
quick scene
sphere and cube
sphere is static rbd with “deforming” transform, basically animating the transform inside at the sop level (to mimic a geo cached object)
cube is regular active rbd object
sphere is animated to collide with cube.
when I run this sim with “use deforming geometry” turned on on the sphere, I do not get any collision happening. Its like the deforming geo is not getting created properly at the start frame or something and its not intialized so it does not collide at all.
if I were to move the animation to the transform level of the sphere instead and turn off use deforming geo, it collides just fine.
I'm not sure whats going on, but it seems bug-like.
has anybody come across this before and knows of a solution?
I've tried all forms of creation frame settings.. and at one point yesterday I got it to work properly and if I didn't quit the scene file it seemed to keep working from that point forward but today when I quit/reloaded the file it stopped working again.
any ideas?
-johnc