Photoshop does something to EXRs. I don't think that it fully supports 32bit floating point EXRs. Just flip them during Bake or in Max set Bitmap U or V value to -1.0. Akin Bilgic created an awesome tutorial on Accurate Displacement map workflow = http://www.cggallery.com/tutorials/displacement/ However i've gotten near…
Ok so the only way i have found out and works at least a little bit is this: 1) follow this tutorial (make all uvw island rectangular like): http://polygonspixelsandpaint.tumblr.com/post/19733351349 2) and use smaller (4096px displk. map). but im not sure how other maps (like difuse or normal) will look like with this…