[Solved] How come CLS clears more than the _DEST image here?

[SMcNeill]

Try:

Code: (Select All)

CLS, 0

The issue may be that you're clearing the screen with BLACK (with a full alpha background), and what you need is to clear it with a TRANSPARENT 0-alpha background.   If these images are supposed to overlay one on top of the other, there's a huge difference between Black and Transparent.

I haven't actually taken time to look at the code yet, but from what you describe, it'd be my guess that the problem could likely be something that simple for you.