Q: Can ZBrush import NURBS surfaces?
A: ZBrush will import the OBJ and DXF formats. Both require that the model consist of polygons. Object generators (such as NURBS) are unique to each program, and so they are not able to be imported.
Q: I’m trying to texture a model imported from Maya, but seams keep appearing and won’t take a texture. Fix Seams doesn’t work, either.
A: The problem is most likely that the UV coordinates are in a negative tile. See this thread for more info.
Don’t miss the ZPipeline Guide for Maya.
ZBrush 3 Threads
Normal Maps
Displacements in Maya 2008 - Tutorial by Scott Spencer
Supplemental Threads
Using ZBrush to detail environmental objects
Zatt v1.0 - A Mel script for Maya to automate importing and applying displacement maps for rendering with Mental Ray.
Maya Renderer
Settings for rendering displacements in the Maya renderer
Turtle for Maya