This is true, and I agree. However there seems to be the opinion that Bryce uncompresses images. That's not accurate. When a compressed file is read, it gets uncompressed. By any program, it still takes up all 24bits per pixel in memory. (give or take a few bytes). Bryce then saves it using a lossless compression scheme. Let's face it, do you really want your hi-resoulution texture map ruined by using a lossy compression scheme? For that reason, yes, don't bother compressing image files before using them as a texture in Bryce or anywhere. If you save it as a .jpg, you are going to lose detail. With regards to the .br5 size question, same point. I used a 9Mb image as a texture on a sphere and got a 5.29Mb .br5 file. Looking at your example, you show a file size increase of 4 times the image's size. When I tried it, the file size increased by just over half the image's size. Why?