[tuhopuu-devel] New development of the material system.

[Nathan Vegdahl]

   I have made yet another addition/modification to the material system.  
However, it breaks compatability (non-fatally) with older blend files: the 
texture mixing settings are not loaded correctly.

   The addition is as follows: textures can now effect the parameters of the 
previously added material models.  If have structured it in such a way as to 
prepare for the plugin system.  Unluckily, it is this very structure that 
causes the compatability problem.

   Here is a diff, so that you can try it out yourself:
   http://www.brunslo.com/cessen/blender_stuff/cessen.diff

   I would like to start a list discussion about the following two things:
      1) How it could be changed to still be compatable with old blend files, 
while not making it complete pain to impliment the plugin system.
      2) Whether or not it should be committed as-is.

   Thanks!

--Nathan Vegdahl (Cessen)