2009

Ray Bias The closest distance at which objects can cast shadows on a given
point in the scene. Setting this value to 0 can cause the point to cast shadows
upon itself, and setting it to a large value can prevent objects close to a point
from casting shadows on the point.
mental ray Sun and Sky
Daylight system > Modify panel > Daylight Parameters rollout >
Sunlight/Skylight drop-down lists > mr Sun/mr Sky
The mental ray Sun & Sky solution is designed to enable physically plausible
daylight simulations and accurate renderings of daylight scenarios. In 3ds
Max, this is achieved through the use of two special photometric lights and
an environment shader that all work together:
■ The mr Sun photometric light is responsible for the sunlight; the direct
light from the sun.
The scene is lit by mr Sun only.
■ The mr Sky photometric light is responsible for the skylight; it simulates
the real-world phenomenon of indirect light created by the scattering of
sunlight in the atmosphere.
Sunlight and Daylight Systems | 5161