Image Gamma (imgGmm)
- float: image gamma value
Used to specify that an image has already been gamma corrected for the
specified gamma value. This allows a reader to adapt the image
appropriately depending on how it is to be used. In most cases,
the image should be un-gamma-corrected back to a linear space before
processing and then be re-gamma corrected afterwords for display.
For example, textures which are used to store reflectance values should
be un-gamma-corrected before rendering and then the rendered image
should be re-gamma-corrected with a gamma appropriate for the
particular display being used.
imgFl "textures/bar.jpg" "" %image file stored in bar.jpg the textures subdirectory
imgGmm 2.2 end %image has already been corrected for a gamma of 2.2