Francemi opened this issue on Jun 30, 2004 ยท 30 posts
diolma posted Fri, 02 July 2004 at 5:23 PM
France, should you want to play about with displacement, (and, yes, it's really worth playing with) just remember that: 1. Use the Firefly renderer (Displacement doesn't work in P4 renderer). 2. In the FF render settings, ensure that "Use Diplacement" is checked, and set the "minimum displacement bounds" to a little ABOVE (ie greater than) the maximimum value you use for any displacement. (Counter-intuitive, but true.) 3. FF can displace both positively and negatively. 0 (black) = NO displacement. Mid-grey (0.5) = 1/2 displacement. White (1.0) = full displacement. 4. You can get negative (inward) displacement (should you really want it, probably not for clothing) by plugging a grey-scale map (or whatever) into a math node and subtracting (eg) 0.5 from it. 5. For clothing, keep the values fairly small. Displacement can distort quite dramatically! 6.. errm .. I could go on (and on), but I suspect that that's enough to go on with for now.. Oh, and yes: The difference between bump maps and displacement is that bump maps only affect shadows/highlights on an unchanged surface; displacement causes actual movement of the surfaces. That is, if you look at a (rendered) bump-mapped plane from any other angle than the front, it'll appear flat (with strange shadows/highlights); a similarly displaced plane will show actual bumps (giving reason for the shadows/highlights). Cheers, Diolma