poser's raytracing is probably the same algorithm as all the other 3D renderers, but it seems to me (from forum messages here) that they usually use 1 bounce, whereas isn't it normal to use 4 or 5 bounces in all the other renderers? there is a highly technical reason why more bounces will produce a more pleasing result, but using 1 bounce is just another problem due to the user's failure to read the manual. AFAIK it doesn't take much more time to render 5 bounces than it takes to do 1 bounce. however, that's the problem. poser renders are often so easily spotted because the poser user has such a poor understanding of the software, and the figure and image are degraded as a result. I was worried about this when they were planning the huge technical jump from P4 (which was just for posing a model), and P5, which was forced to be an all-in-one app. in the process it left less sophisticated users in a state of temporary (or permanent) confusion, as they had no prior experience with real optics, real physics, shader trees, etc. ad infinitum.