In body studio, speed of the render is related to the size of the texture maps you use. So if you're using V3 for instnce, you will want to scale down the textures quite a bit before using the plugin. BUT since body studio opens a poser engine inside of your host app, your host app is now subject to the same problems which plague Poser. You would be better off using a Poser character inside app of choice and learning to use the host app instead.