Editing Luminances

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Or you can select a luminance on the Luminances Palette, right-click and select Edit Luminance.

To create a new luminance, click New Luminance. You can also define a new category, or add a new luminance to an existing category. Click Delete to delete a luminance or category.

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Tip: You can also create a subcategory within an existing category. Click New Category, and use the format "Category\Subcategory."

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Complex luminances can contain up to five light types; each type is represented by a page on the Luminance Editor. For each page, select the desired light type (see Luminance Properties), and edit its parameters as needed. The available parameters depend on the selected light type.
In the Preview section, you can change the shape and orientation of the preview object. Under Options, you can toggle the display of the preview object or desk (the surface below the object). If Auto Preview is checked, the preview will update each time a change is made (otherwise you must click the Preview button).
Click Advanced to change the appearance of the preview object or desk, or the background environment. You can also change the rendering type and thumbnail size.

You can see the new desk and environment in the Preview window.