@Redeemer: JCL once said (and its also written in the manual) that you shall not use the polygon flag for dynamic (moving) entities.
"should not" does not mean the same thing as "cannot". JCL makes several recommendations and suggestions for the layout of your code in the manual, but not all of them are good advice (in my opinion).
I agree. I think the reason was because "complex" objects can get hooked on each other, however a box is not complex at all. I've used this method in A7, with no performance hits (that I noticed), and worked the same in A8. I mainly did this because of the way entity vs entity collisions are handled. My ultimate solution was to look at other engines, as I need to focus on my projects.
