The UVMapper process with the Daz mapper files is a one way process. V2 textures -> V3. Dark Whisper's app does BOTH ways, allowing for V2 to use V3 textures something not possible any other way yet without the app. One of the advantages would be say not owning V3 forwhatever reasons, but loving a new V3 texture. With Dark Whipsers app the V2 model owner can use V2, her clothing items and a V3 texture, without having to purchase a new model. Time saver, cost saver. I'm trying to talk myself into shelling out the $30 for the converter app and find more justification for it. With the V3 clothing issues with V2 clothing, this app would allow you to use the V3 texture on V2 and not have to fight clothing issues, cause everything would be V2. Again, time saving. Only thing, I wish Daz had come up with this and charged a little less money, but Dark Whisper's app is getting great reviews and seems to do what it says it does. my 2 cents.