I tried to sell some images in a small scale and was surprised when it turned out well. Only thing is that some of the potential buyers wanted larger images. I´ve only rendered them in the format 800x600 with 256 rays per pixel. Can I enlarge the images without getting heavy pixelationproblems, or do I have to re-render them? In which case I have to let a printing-company take care of them when it comes to printing. I´m very novice at this kind of things so any advice is greatly appreciated.

Good spelling is overaytead