Hello,
It would be very useful if After Effects could load the OCIO config (i.e. the config.ocio file) specified by the OCIO environment variable.
Almost all other Windows softwares in the Image and VFX industry do - such as Adobe Substance, Maxon Cinema 4D, Foundry's Nuke, Maya, Houdini, among many others.
Why would it be useful?
When a user work in multiple projects (some of them with specific color config and LUTs), there's one config.ocio file per project. Thus, we can create specific project contexts in Powershell (with all the necessary environment variables). For example, say that we have a project A context in Powershell where $env:OCIO=T:/projects/A/ocio/config.ocio. When the Artist will launch AE from this context it will automatically load the correct config.ocio file. Then, if she launches a Cinema 4d from the same context, it will also automatically load the project A's config.ocio file, and so on.
In short, the workflow for working with multiple projects, multiple tools, and multiple color configurations become much simpler when OCIO environment variable is supported.
Thanks,
Rodrigo