ZBrush and XSI work very well together. Don’t miss the ZPipeline Guide for Softimage|XSI.
Well actually they don’t work perfectly together…However it seems to be a problem with Mental Ray.
So if anyone is having seams with Displacement Maps at the UV borders of his model (like me) together with XSI5 there seems no way around it.
The best results so far (still with seams though) I had with the following:
OBJ from XSI
Sculpt in ZB
After Sculpting bring original OBJ from XSI in ZB at Level1
Export Disp Map with MD2 D32 Border 1 Smooth On as well as Seamless, Adaptive instead of DSubPix2
Well hopefully someone will find a way around UV seams with Displacement in XSI