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For Reflected select the Reflection coefficient specification — Using absorption coefficient (the default) or Using refractive indices.
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For Refracted enter a value for Refractive index of exterior domains next (dimensionless). The default is 1.
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For User-defined direction enter the components of the Incident ray direction vector Li (dimensionless) based on space dimension.
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For None no perturbation to the initial ray direction is applied.
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For Create light cones at release points a cone-shaped distribution of rays is released at each point. Enter a value for the Number of rays in wave vector space (dimensionless) Nw (dimensionless). The default is 50. A cone-shaped distribution containing Nw rays is released at each point, which may cause a very large number of rays to be released.
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For Sample from conical distribution a single ray is released at each release point. This ray is given a random perturbation with uniform probability density within a cone-shaped distribution in wave vector space.
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when the Intensity computation is set to Compute intensity or Compute intensity in graded media under the physics interface Intensity Computation section, and
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It is also available when the Intensity computation is Compute intensity and power or Compute intensity and power in graded media under the physics interface Intensity Computation section, and any choice of Ray direction vector displays this section.
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