9

Global Illumination with the mental ray Renderer 93
Refractive caustics re ndered with the default of Radius t urned
off.
Radiussizeisbasedonsceneextents;specifically,1/100the
radius of the full scene.
Radius value explicitly set to 1.0
Radius value increased to 2.5.
Filter type changed to Cone.
Photon count increased to 50,000 (i n Global Light Proper ties
group) for greater detail in the caustics.
Globa l I ll umina tion with t he
menta l r ay R ender er
Global illumination enhances the realism of a
scene by simulating radiosity, or the inter reflection
of light (other than caustics (page 3–92))inascene.
It generates such effects as "color bleeding," where
for example, a white shirt next to a red wall will
appear to have a slight red tint.