MC, convieniently I still have a copy of them in PNG format. The Problem was with the renders I had to remove the backgrounds with the eraser! Any other ways?
I usually remove render backgrounds with the eraser tool in
Adobe Photoshop. I can see how difficult it can be to erase things in
Paint.NET, but from the looks of it, you can get a good cut-out, you just have to be very precise. You missed a number of spots on your renders and it looks like you accidentally erased a little more than just the background on certain parts of the render.
I think I know where you lost the quality of the renders, and that's when you resize them.
Paint.NET resizes images differently than
Adobe Photoshop -
Adobe Photoshop compresses everything if I understand correctly.
This is what happens when I resize a 961 x 1252 image to 301 x 393 in
Paint.NET (zoomed in 300%):
http://img73.imageshack.us/img73/2937/untitledto9.png
Now this is what happens when I resize the same image to the same size as in
Paint.NET, using
Adobe Photoshop (zoomed in to 200%):
http://img102.imageshack.us/img102/5510/untitled2ze2.png
So the problem is that
Paint.NET uses the same compression as
Microsoft Paint. Unfortunately, I don't know how to fix this. You can check out the
Paint.NET forums and see if there are any answers there, or maybe someone here will be able to help you better than me.