CompuServe Messages

David, Roughness doesn't BLUR an object's color, it RANDOMIZES it. So its unsuitable for simulating radiosity, and makes animation shimmer unpleasantly. Also, with radiosity, you don't want to blur the object's COLOR mapping, you just want the reflections illuminating the object to be blurred. Roughness randomizes everything, I believe. The global mapping technique discussed in my earlier message is the most successful thing I've found so far to simulate radiosity. The key to getting it to work seems to be to use the same image for both Color and Reflectivity Brushes (again, that's REFLECTIVITY, not Reflection, there is a difference), only making the Reflectivity Brush much DARKER. Then the Global Reflection map will illuminate the shadows with very nice detail. Read my earlier message and give it a try. <g> Reflectivity Brushes do not MAKE reflections, instead they determine what colors an object is able to reflect, more akin to Color Brushes. The best analogy is a Christmas ornament, you wrap a green, red and blue image on a sphere as a Reflectivity Brush (and Color Brush), and use that in combination with a digitized image of a room as a Global Reflection map. The Reflectivity Brush determines what colors the ornament will reflect, and the Global Reflection map actually creates its reflections. Clear? <G> Tim