Lighting logo type again, trying to tune the fineness of a displacement mesh to get the best tradeoff for detail over speed. You can definitely see the difference, so I guess it’s worth the render cost. :\

Render, review, render, review.  Tuning this shadow animation is time-spendy. And, wow, it turns out mental ray renderse ray-traced shadows very differently (in certain situations) if you set the shadow method to ’segmented’ versus ’sorted’ or’enabled’. I wonder what’s going on there? I’ll have to investigate the difference between segmented and sorted shadows.