Attached Link: http://www.cocs.com/poser/transmap.htm

The attached URL goes into some detail on this--of the tutorials here just tell you how to apply them. A transparency map, or transmap, is a kind of grayscale texture map where texture corresponding to white areas show and those corresponding to black areas disappear. It's a mask such as you would have in Photoshop. You have to open up a UV map for your mesh in a paint program (like Photoshop) and paint on it in grayscale. You can get a UV map either from DAZ if you buy from them--most items have texture templates (UV maps) associated with them, or use UVmapper to create one. i don't use many of the comes-with-the-program models, so i can't recall if they have texture templates or not. The UV maps show the mesh in a stretched out grid. You paint on them (use layers if you can!) so that your white or black overlap the edges of the grid a little, so you don't get seams showing. Anyhow, that's the short form...