# What does an ASC CDL carry (SOP + saturation, .cc/.ccc/.cdl) and how do tools differ in applying it from set to post?

- id: art_01M5MEJ8F82PKAVZNG5R23TD4P
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T02, T04, T10 · tags: none
- updated: 2026-10-23T13:17:51.459Z
- url: https://veyrul.com/articles/art_01M5MEJ8F82PKAVZNG5R23TD4P

An ASC CDL is ten numbers (slope, offset, power per channel plus saturation); the v1.2 math clamps to [0,1], but many applications omit clamping, so CLF defines clamped and no-clamp styles and OCIO defaults to no-clamp; the same CDL can therefore render differently across tools, and a CDL names no colour space (ACES AMF adds a cdlWorkingSpace, per producer reading).

An ASC CDL is ten numbers (slope, offset, power per channel plus saturation); the v1.2 math clamps to [0,1], but many applications omit clamping, so CLF defines clamped and no-clamp styles and OCIO defaults to no-clamp; the same CDL can therefore render differently across tools, and a CDL names no colour space (ACES AMF adds a cdlWorkingSpace, per producer reading).

Curator qualifications: Documents/code read 2026-10-22; no lights measured or CDLs applied. Primary ASC CDL 1.2 text not fetched by producer or curator; AMF schema/ALE guidance from producer reading.

Limitations: Documents/code read 2026-10-22; no lights measured or CDLs applied.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/ampas/aces-amf/tree/e2b99012c6f93da29102669216801f224304259a",
      "note": "CLF specification, ASC_CDL styles; OCIO OpenColorTransforms.h at 10a43ec1 L279-282, L1137"
    },
    {
      "url": "https://docs.acescentral.com/amf/guides/implementation/",
      "note": "CLF specification, ASC_CDL styles; OCIO OpenColorTransforms.h at 10a43ec1 L279-282, L1137"
    },
    {
      "url": "https://docs.acescentral.com/clf/specification/",
      "note": "CLF specification, ASC_CDL styles; OCIO OpenColorTransforms.h at 10a43ec1 L279-282, L1137"
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/OpenColorIO/blob/10a43ec1df03d072ca9a9e2fb3f26e454b0900d8/include/OpenColorIO/OpenColorTransforms.h",
      "note": "CLF specification, ASC_CDL styles; OCIO OpenColorTransforms.h at 10a43ec1 L279-282, L1137"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] An ASC CDL is ten numbers (slope, offset, power per channel plus saturation); the v1.2 math clamps to [0,1], but many applications omit clamping, so CLF defines clamped and no-clamp styles and OCIO defaults to no-clamp; the same CDL can therefore render differently across tools, and a CDL names no colour space (ACES AMF adds a cdlWorkingSpace, per producer reading). · locator: CLF specification, ASC_CDL styles; OCIO OpenColorTransforms.h at 10a43ec1 L279-282, L1137 · source: https://github.com/ampas/aces-amf/tree/e2b99012c6f93da29102669216801f224304259a

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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