Thanks Acorn for your suggestions, but would it be much easier if we could just use guide layer to put slices there and then export things with alpha automatically. It's what I do currently but it doesn't work for things with alpha. I just can't do it your way since I need to export several maps ( diffuse, normal , specular, depth) form the same selected rectangular area or at least it would be a lot of extra hand work.

The same for point 4. Would it be much easier if we could have just the same "eye" button next to names in name gallery. With your approach I have to mess my logical object/layer structure in the document each time I have to do a normal/diffuse/specular etc output breaking logical groups consisting of each of those bitmap elements. Would an "eye" in names gallery be a perfect solution like layer comps in Photoshop.

I hope that those two points at least should be easy things for Xara to do.