Dear listees, I am working on a movie that represents a tangoing couple dancing with in a perspective screen. I have scaled them via an index of the y co-ordinate. The floor of the ballroom is of course a rhombus. The constrain behaviour work with the bounding box of the containing sprite. Hence the problem: how can one constrain a sprite to the bitmap of the constraining sprite. Otherwise cpu sapping calculations seem to ensue. the floor and the wall are different sets of colours with few colours in common. Thanks in advance Andy; wondering if a seagull census might make for less taxing work ;) [To remove yourself from this list, or to change to digest mode, go to http://www.penworks.com/LUJ/lingo-l.cgi To post messages to the list, email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED]) Lingo-L is for learning and helping with programming Lingo. Thanks!]