The OCIO config has been developed by Sony Pictures Imageworks, the studio behind Beowulf and Hotel Transylvania to standardize their color workflow across the production pipeline. The main idea is that the same color workflow (notably LUTs and color spaces) are needed from shoot to texturing with Mari or Photoshop, lighting with V-Ray or Arnold, compositing with Nuke to final grading (also called DI) with Davinci Resolve, just to mention a few. Once the OCIO is defined before any work for the film started, Each department looks at the same picture eliminating errors or approximations, all the process is standardized and automatized
Tutorial to watch next: “vr_color_management_pt4_ACES”