@ serge
I dream about a photoshop clone for layers management.

I donn't really know how Photoshop layers work, but I imagine that it's maybe very complex system.

Last time a have an opportunity to paint a couple things on Corel PhotoPaint (not a "high tech" app as the Photoshop is known) and there is a simple but very handy system which lets to manage all the already painted objects. I don't remember if there was a layers system at all, but even if not, such system of treating particular painted things as objects would be a good substitute.