I guess your gonna just have to hit the books on this a quick google search for 'bi-directional vector rotation' came up with this page if this helps http://en.wikipedia.org/wiki/Rotation_representation_%28mathematics%29
If that's the case, here's something to help communicate with your programmer. This is for Direct3D, but OpenGL has similar methods. http://msdn.microsoft.com/en-us/library/windows/desktop/bb204825%28v=vs.85%29.aspx
Week 29 of my New Years Adventure. A bust of Janine from Ghostbusters, from precisely from the animated show. She changed look from season to season. This is more from the first one.
thanks guys! Klamp - another name is Object Space, here's some more info that really digs into it http://wiki.polycount.com/NormalMap?highlight=%28%5CbCategoryBumpMap%5Cb%29 scroll down and you'll see it :)
Wiki-wiki-wik!! http://wiki.polycount.com/EnvironmentSculpting?highlight=%28%5CbCategoryEnvironment%5Cb%29 And on the same page of this sub-forum no less... Solutions for sculpting tileable textures (other than bricks) in zbrush 4
I don't know about the law in US , but japanese anime has been doing simple knockoff for long time http://nopybot.com/2011/11/29/parodied-brand-names-in-anime/
http://msdn.microsoft.com/en-gb/library/windows/desktop/bb509665%28v=vs.85%29.aspx Basically it will make a linear curve into a stepped one; a steep drop instead of a gradual fade.
Mayterials Day 29 - Desert: I love Diego Silva's Cartoon Cactus (https://www.artstation.com/artwork/6adwrO) so I decided to use today's prompt to give it a shot. I'm pretty happy with the results!