I have a scene with one V3, one V4 and a set of props.   It won't render, even at the most basic settings.   If I hide the props, the Victoriae render.   If I lose the ladies, the props still won't come out to play.   The Poser 6 Firefly engine just capitulates.   I tried the P4 engine, too, and that gave me the big whine about texture sizes. 

I assumed from that that the problem must be to do with texture sizes, so I compared the props to ones by Stonemason which render quickly and excellently in Poser.   What I was expecting was that the props set with the problem would be using enormous texture sizes, which I could try to reduce.  In fact, the textures in, e.g. Stonemason's "The Tin Can" set, which has never given me any render problem, weigh in at a megabyte-plus, whereas the problem props' textures never seem to top 200Kb, although there are quite a few different textures required.

The difference that surprised me was in the relative size of the files in the Props library itself.   This time, the roles were reversed.   Stonemason's creations are tiny, but the ones which I am trying to use in my scene reach 12 megabytes and more.   I have to assume that  that is the source of the problem.   Is there any way to reduce props files to their bare essentials?

I've deliberately not identified the set involved in the problem, because I want to help fix this, not point any fingers.   The same set renders in no time in Carrara (and looks great).