Is the OpenEXR 'acesImageContainerFlag' attribute still a supported thing to write, and did OpenEXR say anything about its name or status?
OpenEXR maintainers settled the status of the ACES container classes, not the meaning of a mixed signal. PR 2560 (merged 2026-09-05) made acesImageContainerFlag a standard attribute after finding that ImfAcesFile never wrote it. The ACES file classes and exr2aces were deprecated in 3.5.0 (2026-09-22), and the issue about the missing flag was closed on that basis. When a reviewer asked what a reader should do if the ACES flag and a different colorInteropID co-exist, no rule was given.
OpenEXR maintainers settled the status of the ACES container classes, not the meaning of a mixed signal. PR 2560 (merged 2026-09-05) made acesImageContainerFlag a standard attribute after finding that ImfAcesFile never wrote it. The ACES file classes and exr2aces were deprecated in 3.5.0 (2026-09-22), and the issue about the missing flag was closed on that basis. When a reviewer asked what a reader should do if the ACES flag and a different colorInteropID co-exist, no rule was given.
Curator qualifications: Public GitHub API reads 2026-10-22; no code built or files written. Curator amendment CA-AM-0056 (2026-10-22): Evidence added for the code label 'OpenEXR (BSD-3-Clause; not re-read)': GitHub license API readback 255b47104d013f60 reports LICENSE.md as SPDX BSD-3-Clause for AcademySoftwareFoundation/openexr at default branch (2026-10-22). Repository level only.
Limitations: Public GitHub API reads 2026-10-22; no code built or files written. Curator addition from the PR body; library code not read.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://github.com/AcademySoftwareFoundation/ColorInterop/issues/15",
"note": "openexr PR 2560 conversation comment 5175728379 (2026-08-04T07:07:56Z); PR 2560 review comments 3700945470, 3701332406 (2026-08-03) and 3741910593 (2026-08-08); PR 2560 (API): merged_at 2026-09-05T00:38:03Z; body Multi-part section and UPDATE; openexr issue 1555 comment 5682327312 (2026-09-15); v3.5.0 release line 41"
},
{
"url": "https://github.com/AcademySoftwareFoundation/openexr/releases",
"note": "openexr PR 2560 conversation comment 5175728379 (2026-08-04T07:07:56Z); PR 2560 review comments 3700945470, 3701332406 (2026-08-03) and 3741910593 (2026-08-08); PR 2560 (API): merged_at 2026-09-05T00:38:03Z; body Multi-part section and UPDATE; openexr issue 1555 comment 5682327312 (2026-09-15); v3.5.0 release line 41"
},
{
"url": "https://github.com/AcademySoftwareFoundation/openexr/pull/2560",
"note": "openexr PR 2560 conversation comment 5175728379 (2026-08-04T07:07:56Z); PR 2560 review comments 3700945470, 3701332406 (2026-08-03) and 3741910593 (2026-08-08); PR 2560 (API): merged_at 2026-09-05T00:38:03Z; body Multi-part section and UPDATE; openexr issue 1555 comment 5682327312 (2026-09-15); v3.5.0 release line 41"
},
{
"url": "https://github.com/AcademySoftwareFoundation/openexr/issues/1555",
"note": "openexr PR 2560 conversation comment 5175728379 (2026-08-04T07:07:56Z); PR 2560 review comments 3700945470, 3701332406 (2026-08-03) and 3741910593 (2026-08-08); PR 2560 (API): merged_at 2026-09-05T00:38:03Z; body Multi-part section and UPDATE; openexr issue 1555 comment 5682327312 (2026-09-15); v3.5.0 release line 41"
}
]
}Evidence claims
- [sourced_fact] OpenEXR maintainers settled the status of the ACES container classes, not the meaning of a mixed signal. PR 2560 (merged 2026-09-05) made acesImageContainerFlag a standard attribute after finding that ImfAcesFile never wrote it. The ACES file classes and exr2aces were deprecated in 3.5.0 (2026-09-22), and the issue about the missing flag was closed on that basis. When a reviewer asked what a reader should do if the ACES flag and a different colorInteropID co-exist, no rule was given. · locator: openexr PR 2560 conversation comment 5175728379 (2026-08-04T07:07:56Z); PR 2560 review comments 3700945470, 3701332406 (2026-08-03) and 3741910593 (2026-08-08); PR 2560 (API): merged_at 2026-09-05T00:38:03Z; body Multi-part section and UPDATE; openexr issue 1555 comment 5682327312 (2026-09-15); v3.5.0 release line 41 source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |