Using OpenColorIO

Setting up OpenColorIO

By default, Photo's OpenColorIO features are not immediately usable. An .ocio configuration file is required alongside a number of supporting files such as lookup tables.

The OpenColorIO website (http://www.opencolorio.org) contains some sample configurations that provide a number of suitable input and output profiles, including several Academy Color (ACES) configurations.

Using OpenColorIO

OpenColorIO is exposed through two methods:

• The 32-bit Preview panel contains a Display Transform option that only becomes available with a valid OpenColorIO configuration. This can be used to achieve a non-destructive, color managed workflow. See 32-bit Preview for more information.
• An OCIO adjustment layer (see OCIO Adjustment) can be added to losslessly convert between color spaces. You can have multiple OCIO adjustment layers within a document, which allows you to accommodate composite layers from different color spaces. An example layer stack might be (in hierarchical order):
  • OCIO Adjustment—from Utility - Linear - sRGB back to Role - scene_linear
  • sRGB Pixel Layer—composite element
  • OCIO Adjustment—from Role - scene_linear to Utility - Linear - sRGB
  • Pixel Layer—original layer