Is the built in collision mask feature even meant to be used on things such as your player, or enemies? I applied it to one of my enemies (manually in each frame.. as "copy collision mask to other frames" or w/e just deletes all collision masks) and it brought my FPS down to 40..
If it is meant to be used on things like enemies, what's the "proper" way to set it up? I imagine if the hotspot for the collision mask is to the far left in one frame, and the far right in another, then the object should get stuck in the wall. However, it doesn't..so I'm really confused on how it works.