Heya Holyforest, I am the Bast who wrote the post above, as most here know ;) As you probably noticed, that post is quite old, and others are in charge of defining standards in the store now, and most of those standards of mine above are "gone with the wind" so to speak ;) However, other than the compression issue, which I would choose to now modify, my stance on the above remains the same. Nowadays, due to the size of the textures coming in being at times as large as 4000 x 4000, and also due to most products shipping these days with multiple textures instead of one or none (which was the issue then, folks not wanting to include any texture), I would recommend very slight compression for JPG's since this would greatly reduce file size on download. A big problem these days in the store is the size of the downloads coming in grows larger each day, and 25 or 30 meg downloads are nothing unusual now :( To answer your question on bump maps: I personally include the bump map in a jpg format, and name it appropriately, such as head_bump.jpg, then include VERY explicit directions in my readme folder on how to apply this bump map using both Poser Pro Pack, and regular Poser 4/3. Poser 4/3 will convert the jpg to it's own proprietary format for them upon their attempt to convert it. This I think is a better method than shipping the .bum format after Poser converts it, since this is a VERY large file format, and will greatly increase the file size download of the finished product. I have not however had any problems in getting a .bum format to zip up inside a zip file :) It is just very large, and does not compress very well. If you feel your customers may not be able to follow through and do the conversion on their own, and wish to include the .bum format for their use, be sure to also still include the jpg from which your bumpmap is built originally, so that Poser Pro Pack users can apply that to their models, since Pro Pack doesn't support the .bum format. An additional area I would add to this list of helpful criteria is to NOT ship most of the default morphs that come on Vicki, Posette, Michael, etc. By using Morph manager to strip the cr2 of most morphs that are not needed by your character, you radically decrease download size of the cr2. I personally use Morph Manager to flatten out my morphs to one or two per body part that is my "character" I am selling, and on the head area, I leave in place those morphs used for facial expression such as "smile", "open smile", "part lips" etc... and I remove all the old facial shape and body shape sculpting morphs that Daz included. Later, if your customers want these morphs back, they can use Morph Manager to copy them back onto the character themselves. Using this method, I have managed to ship as many as 2 versions of each character, props, clothing, library files, multiple texture maps, etc, for less download file size than I see just one character and set of maps being shipped at here in many cases. As always, I am here to help as I may Liz Birdsong highbrowglyphics@home.com