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This page provides information on the Corona Tonemap Control Map. 

 

Overview

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You can use the Corona Tonemap Control Map to exclude a specific texture from the VFB exposure and tone mapping influence. The Corona Tonemap Control Map transforms the texture using the inverse of current color mapping, effectively removing any post-processing color mapping from it. This can be useful for rendering an emissive texture that exactly matches the input bitmap in the resulting render under any color mapping. For this feature to work correctly, the color mapping must be specified before the rendering is started and cannot be changed afterwards.

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While the Corona Tonemap Control Map works fine most of the time, there are some special cases where it may fail, for example: using some LUTs, using extreme tone mapping operator values, setting the Contrast value to zero.

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