Hmm, I'm curious but why would you need more than one texture on an object for a low-poly situation? If you were doing multipass rendering such as Unreal 3-esqu, you'd have a color map, an ambient map, a specular map, a bump map, and a displacement map, but Unreal (for example) is very far from low-poly work such as WoW sports. Are you trying to do this in Bryce, or in WoW? If your question is Brycean, are you using the Material Lab to mix the texture together? If you have access to Photoshop or PSP, you can blend any number of textures together any way you like using layers and such. One cool thing about Bryce's exporter (the only cool thing?) is that it WILL export all your maps separately. So you could export these maps and then bring them into post-production for making changes, then re-import the map back into Bryce as an image texture...