ACES 2 Presets¶
The reference Output Transforms provided in CTL support a number of gamuts, white points, luminances, and display configurations.
Rendering Transform Presets¶
Color Primaries and Peak Luminance¶
The limiting gamuts and peak luminance combinations that are provided as presets include:
| Target Gamut | Target Luminance |
|---|---|
| Rec.709 | 48/100 nit |
| P3 | 48/100 nit |
| P3 | 108 nit |
| P3 | 300 nit |
| P3 | 500 nit |
| P3 | 1000 nit |
| P3 | 2000 nit |
| P3 | 4000 nit |
| Rec.2020 | 500 nit |
| Rec.2020 | 1000 nit |
| Rec.2020 | 2000 nit |
| Rec.2020 | 4000 nit |
Creative white point¶
Each of the above are also provided two different preset creative white points:
- D65 white
- ACES (~D60) white
Display Encoding Transform Presets¶
The encoding gamut is defined with (x,y) chromaticities for red, green, blue and white.
Color Primaries¶
The preset display gamuts are as follows:
- Rec.709 / sRGB
- P3
- Rec.2100
- XYZ
Inverse EOTF¶
The inverse EOTF is defined via a functional definition of the EOTF\(^{-1}\).
In the CTL, the EOTF\(^{-1}\) options are selected with enum values:
- Linear
- ST. 2084 (PQ)
- HLG
- Gamma 2.6
- BT.1886 (Gamma 2.4)
- Gamma 2.2
- sRGB IEC 61966-2-1:1999 (sRGB Piecewise)
Other outputs and presets can be added if and when the need arises.