when you have a complex scene with a lot of objects it will take a lot of time time to render if you use 100% transparency.

of course this wouldnt be a problem if morph targets would work how they should on dynamic clothes.i am so angry right now.

 

Poser 9 and Pro 2012 is realesed and they didnt add what i asked them for years. to have an option to make material groups invisible for rendering. every modern render has this. material groups are based on polygons. so making a material group invisible for rendering is not hard because the software only looks up the polygons. BUT NO. poser 9 is out and they didnt add it.