Odd physics problem: Physical ball spins in place on some surfaces in Building and Texturing Forum Posted March 8 8 hours ago, Mollymews said: the SL physics ball works the same as a RL ball if we don't hit the ball in the center (center meaning that our avatar bounding box front is at a 90 deg angle to the center of the ball) then we put spin on the ball (as Prof mentions). A way to see if our avatar is hitting the ball in the center is to use the viewer Front View camera if the ball rolls straight down an incline object but then spins when it passes onto the next incline then check the physics shape of the next incline object. If they are not perfectly aligned then the ball can get spin put on it if the incline objects are perfectly aligned then it can be server lag. For some tiny micro time the next incline object collision is not detected and the ball begins to fall due to gravity, and then the incline object is detected and the ball will pop as it is forced out of the now present object. That pop can put spin on the ball I know it should, and does under some circumstances. In the test circumstances, it doesn't... that's the problem. I'm aware of physics alignment. Spin is fine - but it just gets stuck, without ever leaving the prim it's on. At this point I am fairly sure something fishy is going on with the physics between ball and anything else. Your post gave me an idea though. I hadn't tried this with a tilted floor prim... and it triggers too, making the ball slide reaaaaaallly slow-mo down that slope. Again, not expected behavior, though funny to watch. If need be, I can record a video of the different behaviors.