Just saying, there seems to be an annoying conflict between changing animation direction and having a graphical angle to an active.

For example, a hidden collision mask code:
- Set AnimDir left (which is a small graphic)
- Test for collision
- Set AnimDir right (which is the normal graphic which is supposed to be the only one displayed at runtime)

This doesn't work when an object has an angle applied to it. It works if I never change the animation direction back though, but that's not really aesthetically pleasing, and is just like using a small object to begin with...

UPDATE: I had to solve it using resizing of the active. So it works now but it's probably much less efficient.