Engine API Reference - v2.24.0-beta.28
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    Variable TONEMAP_ACESConst

    TONEMAP_ACES: 3

    ACES filmic tonemapping curve, using Krzysztof Narkowicz's fit. A single curve is applied to each color channel, without the color space conversions of the ACES transforms. See TONEMAP_ACES2 for a fit that includes them.