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Pick Illumination Samples the amount of illumination from a surface
that you select. To save you from inadvertently making bright or dark spots,
Pick Illumination uses an amount of illumination relative to the surface
illumination you sample. Click the button, and move the eyedropper cursor
over the surface. When you click a surface, the amount of illumination in lux
or candelas is reflected in the Intensity spinner. For example, if you used Pick
Illumination over a wall that has 6 lux of energy, then 0.6 lux displays in the
Intensity spinner. The amount of illumination 3ds Max adds or removes on
the surface will be this value multiplied by the Pressure value.
Clear Clears all the changes you made. Processing additional radiosity
iterations or changing the filtering amount will also discard any changes to
the solution you made with the light painting tool.
Using light painting to add or remove light in a radiosity solution.
Rendering Parameters Rollout (Radiosity)
Main toolbar > Render Scene > Render Scene dialog > Choose Default Scanline
Renderer as the active production renderer. > Advanced Lighting panel > Select
6016 | Chapter 18 Rendering