As a quick trick for poser renders, and no it's not as good as ray tracing, but you can get passable results with a little experimentation: do a render of the object to be reflected, from the angle the "reflecting" object will see it... it helps to diddle with the focal length of the camera too... use distorting wide-angles for convex surfaces, etc. Alter the resulting jpg as desired in psp or whatever... if you need precise placement build it as you would a texture, then apply it as a reflection map on the desired surface... I learned that trick here, but I can't remember who from. For stills it can produce pretty decent results.