Why this error appears?
The OCIO 3ds Max Default mode includes color transforms as part of its configuration, and these transforms often incorporate tone mapping or view transforms that achieve similar goals to ACES OT. When ACES OT is applied on top of an existing view transform, the result is that the color data is transformed twice, leading to visual inconsistencies and incorrect results.
How to Resolve the Issue?
To get rid of this error and ensure accurate color output, you can choose one of the following solutions:
1. Disable ACES OT:
If you want to use the existing color management system with its view transform, disable ACES OT in the Tone Mapping settings. This avoids duplicating the color transform.
2. Switch to Gamma Workflow:
Alternatively, switch from OCIO 3ds Max Default (an OCIO-based color management mode that uses the built-in default 3ds Max configuration file) to Gamma Workflow. Gamma Workflow is the legacy color management mode. It assumes that the monitor primaries are Rec.709/sRGB and it does not incorporate view transform.