Here's how to make a transparency map from an image with an alpha channel, using Paint Shop Pro. I assume there are similar procedures in other packages. Open the image with the alpha channel you want to use, and leave it alone; PSP just needs to know it's there. Create a new 24 bit image with the same dimensions as the first one. Flood fill it with perfect black. In that image, create a new raster layer. Flood fill that with perfect white. While the white layer is still selected, go to the Masks menu and select Load from Alpha Channel. You should see the mask from your previously loaded image if it's the only one, if you had other images open you may have to select it from the list. Flatten the image and save as JPEG - that's your transmap. Apply that in Poser's material room, and make sure that maximum and minimum transparency settings are 100%. Your original image becomes the texture map, of course.