Houdini 11 VEX VEX functions

Computes irradiance (global illumination) at the point P with the normal N.

  1. vector irradiance(vector P, vector N)

Computes irradiance (global illumination) at the point P with the normal N.

Keyword arguments

See optional parameters.

adaptive

1 or 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.

lightmask

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 surface. The "scope:default" value will cause the lightmask argument to use the default light mask for the current context - as if the argument were not specified.

    ..., "lightmask", "hotlights*");
    

Contexts: fog, light, surface

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