No idea about the slow-down problem but you may want to read up on LoadAnimImage. It lets you load a sequence of same-size frames from the same image. That'll avoid the need to do any of the above anyway.
Blitz 3d LoadImage Problem
Blitz3D Forums/Blitz3D Beginners Area/Blitz 3d LoadImage ProblemThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.