With transmaps, what i know so far is: use the UV maps that come with the DAZ clothes, or use UVMapper to get them (that's beyond this quick reply). Open the UV map bitmap in Photoshop. Create a layer above that, and fill it with 100% white, then take the layer opacity down to about 50% so the grid from the UV map shows through. When making a transmap: white shows, black vanishes, greys are translucent. Therefore: if you want to make a tank top out of the catsuit, for instance, paint black over the areas you don't want to show. Use the UV Map peeking through as your guide; you have to count squares, pretty much. i found i get smoother results if i use the vector tool to do my lines, do one half, and then copy and flip it over to the other half of whatever-it-is. There is some possible weirdness in that things that are transmapped like that can still cast odd shadows; another thread here covered that.