Computes irradiance (global illumination) at the point P with the
vector irradiance(vector P, vector N)
Computes irradiance (global illumination) at the point P with the normal
See optional parameters.
0. Turns on an automatic optimization that will reduce the
number of samples when there is little variation in occlusion
above the sample point. This can improve performance at the
expense of some possible flickering or additional noise.
You can use the
lightmask keyword argument to pass a light name
pattern to limit the set of lights used to illuminate the hit surface.
This allows the tracing surface to control the lighting of the hit
"scope:default" value will cause the
argument to use the default light mask for the current context - as if
the argument were not specified.
..., "lightmask", "hotlights*");