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Chapter 4. Changes in Rendering > New Exposure Control

New Exposure Control

The new Exposure control gives the user the capability to affect the output of final software renders through the use of a physical light model based on a candela multiplier. Candelas are an industry-standard measure of light used throughout the film and architecture industries; one candela represents the approximate light output of one candle. This multiplier is applied to the multiplier of each light in a scene as well as to self-illumination and reflections/refractions created with the raytrace map or material. Exposure control will not affect reflections/refractions created with the Reflect/Refract or Flat Mirror maps.

The Exposure controls can be accessed from within the Environment dialog box located in the Rendering drop-down menu (see Figure 4.8). By selecting Automatic Exposure Control, an automatic histogram is created and applied to the final rendered image. The result is a significantly more contrasted image that, in the case of very dark scenes, can give certain lighting effects more punch.


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