[Bf-committers] Volumetrics update

[echelon at infomail.upr.edu.cu]

Hi all!

  I finally get implemented self shadowing with the sameraycast algoritm
core. render times increase as you may expect, but there are many
optimizations the user could do acording to the level of cuality he want
to achieve.

Also get implemented the ligth falloffs for ligths (all kind of falloffs)

and start implementing 3D object falloffs for volumetrics like
linear,cuadratic,cubic and (although need UI) custom curve falloffs.