Is there a way to incorporate custom or user provided IDTs in Baselight’s ACES CMS, in the same way DCTL is sometimes utilized for Davinci Resolve? It’s just for testing and do not want to bother Filmlight to add numerous modified IDTs.
Yes. All Baselight’s colour space transforms are defined in human readable .flspace text files. These define as a shader the functions to and from linear, and the XYZ matrix. You can look at the definitions of the built in colour spaces in /usr/fl/etc/colourspaces and use one of those as a template to make your own.
Edit:
One other thing. The rows in the XYZ matrix need to be normalised to sum to 1.0
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You can also use tl-utils TcsMatrix to help create an .flspace file
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This is only true for the legacy mat = [array... syntax.
We discourage users from using that.
In the newer RGB_XYZ = [array... the white point is maintained in the matrix.
Best is to have a read at tl-utils TcsMatrix -h
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