I'm not sure I understood everything. lol. Sorry, I just woke up. But let me take a shot at this. If a Mat file specifies a jpg instead of a bum, and you use it in P4, it will add the jpg to the bump list without converting. If it was already loaded in the list, and then you tried to select it to convert it, it won't convert because it is already in the list. Make sense? From what I am getting of the PP issue, it sounds like the MAT file called for the bum. Poser will load what the MAT file calls for if it is available, regardless of whether it is the correct format, without asking for conversion. Unless it is calling for a format that isn't available, in which case it goes hog wild. I would definately run CR. But here is a word of advice first. Make sure all you Bumps are converted to .bum before running if you are going to use them as p4. Otherwise, CR will change all the bumps to .jpgs when it can't find the .bum files. Great if you are on propack, I guess. Sucks if you are on P4 and have to change them all back. :) Also take a look at the files you were trying to load and make sure the were calling for the right format themselves. Did I understand everyting? If you only wanted to use Propack, then you shouldn't need bum files at all. If it is calling for them for propack, you will need to edit the MATs to reference the .jpg state.