I could decrease the size of my PZ3/PMD files by deleting morphs which I would not ever need from figures in the scene. This is a modest memory savings in the size of the saved file. I do not know if this allowed faster renders, but it did allow the files to load a little faster, and I could sneek in an extra prop of two before it wouldn't render.

LMK

Probably edited for spelling, grammer, punctuation, or typos.