Hey
I'm getting this issue with newer max versions (2013 vs 2011) where as I try to bake my low res ambient occlusion, I get faceted results.
The process is the usual render to texture Ambient Occlusion (MR), samples are fine and render in general is fine, just get facets as if my object was suddenly set to no smoothing groups.
Any ideas? Only get this in 2013. Resorting to light tracer scanline for now.