What did posts 21-46 of ACEScentral thread 'ACES 2.0 Output Rendering' report about saturated-light test renders, rendering primaries and the red/pink tilt of ACES 2.0?
Thread 5770 posts 21-46 (2025-04-21 to 2025-08-10) concern rendering primaries rather than blue artefacts: multiplying sRGB red by sRGB blue gives zero, but doing the multiplication in ACEScg and converting back gives a small non-zero purple, so the choice of rendering primaries changes light interaction (green vs purple ball test reproduced by a second user in Blender); the last posts report ACES 2.0 tilting bright reds toward pink-salmon compared with OpenDRT. No fix is concluded.
Thread 5770 posts 21-46 (2025-04-21 to 2025-08-10) concern rendering primaries rather than blue artefacts: multiplying sRGB red by sRGB blue gives zero, but doing the multiplication in ACEScg and converting back gives a small non-zero purple, so the choice of rendering primaries changes light interaction (green vs purple ball test reproduced by a second user in Blender); the last posts report ACES 2.0 tilting bright reds toward pink-salmon compared with OpenDRT. No fix is concluded.
Curator qualifications: Forum posts read 2026-10-22; no transform, DCTL or render run. Products recomputed by hand from the quoted arrays (0.61311781x0.04578734 = 0.02807; consistent); conversion matrices not re-derived.
Limitations: Forum posts read 2026-10-22; no transform, DCTL or render run.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://community.acescentral.com/t/5770.json",
"note": "community.acescentral.com/t/5770.json; t/5770/posts.json remaining ids: posts 27, 33, 34, 36, 38, 39, 45, 46"
}
]
}Evidence claims
- [sourced_fact] Thread 5770 posts 21-46 (2025-04-21 to 2025-08-10) concern rendering primaries rather than blue artefacts: multiplying sRGB red by sRGB blue gives zero, but doing the multiplication in ACEScg and converting back gives a small non-zero purple, so the choice of rendering primaries changes light interaction (green vs purple ball test reproduced by a second user in Blender); the last posts report ACES 2.0 tilting bright reds toward pink-salmon compared with OpenDRT. No fix is concluded. · locator: community.acescentral.com/t/5770.json; t/5770/posts.json remaining ids: posts 27, 33, 34, 36, 38, 39, 45, 46 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. |