How do you make a thumbnail for uploading your pictures??

All you have to do is go into an image editing program (photoshop, corell, painter, ms paint) and "resize" the image. Usually thumbs are arond 200 pixels at their largest dimension. If you do not have an image editng program you are familiar with, the render the image at the smaller size and save it under a different name.

Thanks mlofrano. Can this be done in the Bryce Document set up as well.All things should be contained in Bryce, right??..........

Yes. You can do it in Bryce all you have to do is change the size of the render in document setup, but remember to rename it first before rendering it (save it under a different name) because it will overlay the big image if you don't. It doesn't have to be done in Bryce. As I said, you can do it in an image editing program, which is the way most people would do it and the easier way to do it. I just mention the re-rendering in case you either are not familiar with or don't have an image editing program. When it is time to upload it, it will ask you to browse to the directory where you saved it. The thumbnail and the Bryce image do not have to be in the same directory, because it will ask you the location for the thuumb and the main image seperately. That is, you will be doing 2 uploads. I know it sounds like a lot, but once you do it you will see how easy it is. I hope I am making myself clear. If not please feel free to question me about what you don't understand.