There are defaults for
"Neutral", etc.), but I would like to illuminate an object (e.g., a simple sphere) with a light coming from a continuous distribution that I define, for instance the sum of the real parts of two or three spherical harmonics. Is there a way to achieve this?
Of course I don't want to create some extremely large number of point sources, each with a specified intensity. (Regardless, the required distribution of such sources is related to the desired illumination distribution by an extremely complex function.)