What is the difference with a PNG and a BMP? Fractal Explorer automatically converts to BMP with big files, but Apophysis gives you a choice. I've been using BMP, but wonder if I should be using PNG. Yeah, I know, it's kinda a dumb question, but I've just started using Apop, so I never ran into this before. Jeff

Both are bitmap images. This is what they share. BMP is not compressed and so, you will get very huge files. It also cannot handle transparency if there are parts of your image that is transparent (e.g. like transparent GIF). PNG is compressed, so you will get smaller files. Its compression is also non-lossy. This means that you won't loose image quality like you have in JPEG (which is lossy). It also handles transparency (like transparent GIFs) and even alpha channels if you software allows you save them. Hope this helps. Miche

Big thanks. That completely sums everything up without any confusion. Looks like I'll be doing much more PNG's.