with point lites, the r-squared falloff actually works on any single flat surface which they're illuminating, even without using frodo's node set-up. try it with a point lite above the ground, and no nodes in the light material. you'll see that the point lite shows increasing falloff with the distance along the ground from the point directly below the lite, even tho no fall-off has been set (by default). of course, the point lite will still have incorrect fall-off when illuminating opposing surfaces at increasing distances. that's where frodo's node set-up comes in. what would be useful for ceiling illumination and such, is to have a renderer in poser which calculates reflections like most other ray-tracing renderers. altho an IBL inside a room would be counterintuitive (at least to me), for some wacky fun, try adding an image map to the diffuse channel of the point lite. for some reason, an IBL causes the projected lite to be soft and blurry, almost like in real life, but the point lite doesn't.