"but once you wrap a mesh in a uv map using Silo, how do you render it?"

in Poser :)

you should be viewing your meshes in Poser anyway, since there are extra considerations when it comes to modeling for Poser smoothing... when it comes to creating meshes for Poser, WYS isnt always WYG.

worst case scenario, you can always just selectively disable smoothing for your objects in Poser (under the object's Properties tab).