I was wondering how I could model complex and seamless normal maps in an efficient way. Which app to use? I'm XSI user, there is a better suited app for such task? I made some seamless normal maps in XSI, but they were quite simple at the edges, not a big problem to make them seamless.
Regarding the approach, these normal maps are going to be coupled with world textures, so maybe it's a good idea to start with geometry generated from a height map (but not necessary in all cases). Once modeling is done, the hard part (at least for me) is to make it non tilable. I suppose it should be done like PS offset filter, just cutting the mesh into 4 parts and each piece is rotated 180º. Am I right or is there a better method?