by Skinnytorus » Wednesday, 23.October 2013, 21:04
I didn't check if UVs were also exported (i guess they actually are), but for material ids: create your clusters in XSI, export *.xsi, import it to wz4, and use 'cluster' input option in the Select operator. Cluster number param cycles through the clusters you set in XSI.
It should be possible to load wz3minmesh with import operator (mesh) (look at supported extension in open dialog box). But don't know how to export in wz3...