Correct, they render find as long as there's a larger prop or figure in the scene.  By themselves you get the odd effect.   So this is not considered an issue for freebies or marketplace items?   I'd like to resolve it completely, I seem to have some other small props that don't do this, I'm not sure why they don't.

Trekkie, I had intended to release this set as a freebie soon as I get things sorted.  The set includes the brush, a shaving mug, a round puck of soap and a straight razor that opens and closes.  I had wanted to include a few different textures / MATs and displacement maps with it for some variety.

But I'd really like to get this sorted first.  I may try going back and rebuilding a single one of the meshes, but starting much smaller in Blender and see if that helps any.  It does seem to have something to do with scaling and I have figured out that the scaling info from its original size to whatever size I exported it is stored in the OBJ file somewhere.  So I'm wondering if Poser just can't handle all that scaling.  If the prop was just black that would be one thing, but those odd shadows seems like maybe the geometry has gone wonky somehow.

Fortunately you guys can't hear me cussing like a sailor over this, its been very frustrating!  LOL