Hello,

I think (need confirmation) that CentroidTriangulation=y by default.
I have disable it too because sometimes it can introduce render artifact when dealing with very long skinny polygons in the meshing. (mostly happens in fillet area for me)

http://moi3d.com/forum/index.php?webtag=MOI&msg=3533.14

For Zbrush, I prefer to use the 'tris and quad output', and using the 'divide larger than' parameter as low as the memory usage allow.