# Help with bitmap motion/shape tween

**URL:** https://forum.kirupa.com/t/help-with-bitmap-motion-shape-tween/30818
**Category:** Uncategorized
**Created:** [September 14, 2003, 9:38pm UTC](https://forum.kirupa.com/t/help-with-bitmap-motion-shape-tween/30818 "2003-09-14T21:38:50Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Ironman](https://avatars.discourse-cdn.com/v4/letter/i/f9ae1b/32.png) [@Ironman](https://forum.kirupa.com/u/Ironman)
#### Post date: [September 14, 2003, 9:38pm UTC](https://forum.kirupa.com/t/help-with-bitmap-motion-shape-tween/30818/1 "2003-09-14T21:38:50Z")

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I have a book i’m attempting to animate. The cover opens and the problem is I need to distort the bitmap in order to make the animation completely realistic. Obviously, I could do a (size costly) frame by frame version, but I’m not too thrilled about that. I can obviously do a motion tween with scaling and the book cover closes fine. Problem is that with perspective, I need the height of the cover’s edge to get larger as it approaches the 90 degree angle point. Get what I’m saying? How can I apply a tween that will allow me to scale AND distort the bitmap while retaining a good, clean tween on the bitmap (without unwanted affects)?