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Posted 18 September 2012 - 08:38 AM
Posted 18 September 2012 - 08:59 AM
This gets into painting territory, James Gurney has an excellent book on lighting that covers a lot of issues like this. Shadows are the absence of a light source contextual to surrounding areas that are fully or partially lit. Therefore, if there are other light sources in the area, the shadows can take on the other light source's hues, or splash color from surrounding elements. If I light a box with a blue gel on the left, and a red gel on the right, then in the red light's shadow, you'll just get a blue color, and vice versa.
Also I've realized that shadows are not always a result of multiplying some grayscale value but there's a subtle hue to them in certain lighting situations. Not sure if this is the result of ambient lighting reflected by objects or something else.
Posted 18 September 2012 - 12:32 PM
If you want the simplest solution, just add an ambient value to everything (shadows and brightly lit areas). You could vary this depending on the time of day.
Posted 18 September 2012 - 02:31 PM
Posted 18 September 2012 - 04:01 PM
Posted 19 September 2012 - 08:52 AM