This advanced light shader is designed to be physically accurate in its base configuration but can be easily modified for artistic effect.
PhysicalLight is meant to work with PhysicalCamera — simply set the lens shader to a realistic photographic exposure and your PhysicalLights will render as you would expect realistic lights within the scale of your scene.
Unlike most light shaders in biased rendering engines, PhysicalLight does not take arbitrary input values: Instead, you can enter (or choose from a useful range of presets) your light’s color temperature and luminance in watts, which actually correlates to real world values. The shader supports area lights, soft shadows and IES profiles for even more realistic effects.
PhysicalLight was modeled after Maxwell’s light model to ensure the utmost physical accuracy while at the same time providing quick render times.
Usage
PhysicalLight can be used to realistically simulate artificial light sources such as electric bulbs, candle flames and fluorescent tubes.
