Fugazi1968 opened this issue on Aug 06, 2009 ยท 96 posts
bagginsbill posted Fri, 07 August 2009 at 9:21 AM
I imported a welded 6-polygon box. I enabled smoothing, and set the crease angle to 95 degrees, so all the edges would be smooth. I duplicated it and rotated the second one so a corner is facing us.
It's not exactly a sphere, but it demonstrates micropolygon displacement.
If I were to carefully craft a displacement map (would not be easy - lots of math) I could force it to be a perfect sphere. I don't have time right now to do that.
Smoothing in Poser is basically the same as displacement, except not driven by a map image, but by analyzing the geometry itself.
The flaw is revealed by the ray-traced shadows. Ray tracing is a bag on the side of the REYES renderer, and for ray-traced shadows (or reflection or refraction) the displacement is not implemented except on the vertices. Thus, the true geometry (boxes) are revealed by the shadows. With a higher poly model, this problem is not so obvious. With depth-mapped shadows, this problem doesn't exist - the shadows are round.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)