@dgobbi , thanks for looking into the code. Changing the epsilon to 1e-12 would be more than sufficient for my purpose. The epsilon of 1e-3 is already on the edge of occuring cases.
@lassoan , about the UserMatrix, I’ve been trying to avoid UserTransforms due to Are UserTransforms going to be deprecated?.
For me the ultimate solution would be to set the Matrix of the actors transform directly. Would a PR for that be appreciated or is there a reason to disallow setting it directly?