Quote:
Originally Posted by Brian Bradley
I assume that the help is making a distinction between possible
GI solutions that people may be using, such as Radiosity which
is very much Geometry dependant. Chabnge the geometry and
you will need to recalc your GI solution, which is not the case
with photon mapping. (as a rule) 
regards
Bri |
Why would you not need to recaculate the photon mapping if you change the geometry? ....this is what doesn't make sense to me. maybe i need to study more on how photon mapping works.
The majority of my GI experience is with Vray's irradiance map, so I am processing this in relation to those terms. Using irradiance passes, the map is representation of the 3d geometry in the scene. If I change the geometry, then the map created by the irradiance solution does not have the proper geometry to align to, and becomes invalid.
It is this thinking that is confusing me on photon mapping. I remember the tutorial saying something about the way it is calculated, but I can't remember exactly what it is now. I will look at it again in the morning, and try to decipher it.