# ColorLUT

Interface · category: Other

Source: https://github.com/playcanvas/engine/blob/970d89f6d3bc6667f4e1f88153abd6e7e82ed52c/src/extras/render-passes/camera-frame.js#L112

Properties related to the color lookup table (LUT) effect, a postprocessing technique used to
apply a color transformation to the image. Two LUT slots are supported, which makes it easy to
crossfade between two graded looks.

## Properties

### blend

```ts
blend: number
```

Crossfade between the two graded results, 0-1 range. 0 shows only the
primary LUT, 1 shows only the secondary LUT, intermediate values produce a linear-space mix.
Only used when `texture2` is set. Defaults to 0.

### intensity

```ts
intensity: number
```

The strength of the primary LUT, blended against the original
color, 0-1 range. Defaults to 1.

### intensity2

```ts
intensity2: number
```

The strength of the secondary LUT, blended against the original
color, 0-1 range. Only used when `texture2` is set. Defaults to 1.

### texture

```ts
texture: Texture | null
```

The primary LUT texture. This must be a 256×16 2D "horizontal
strip" texture representing an unwrapped 16×16×16 3D LUT in Unreal Engine layout: 16 horizontal
slices along the blue axis, with each slice mapping red to the X-axis and green to the Y-axis.
Note that HALD LUTs (e.g. from ImageMagick) and Unity LUTs use different layouts and are not
compatible. The texture must be loaded with `srgb: true` (LUTs are authored in sRGB display
space — the Unreal / Photoshop workflow stores sRGB-encoded values indexed by sRGB-encoded
coordinates), `mipmaps: false` (sampled at LOD 0 only), and `minFilter: FILTER_LINEAR` /
`magFilter: FILTER_LINEAR` (bilinear filtering between LUT entries is required to avoid
visible banding). The engine emits a debug-build warning if any of these are misconfigured.
Defaults to null.

### texture2

```ts
texture2: Texture | null
```

The optional secondary LUT texture, same format and
requirements as `texture`. When set, both LUTs are sampled and the two graded results are
crossfaded according to `blend`. Defaults to null.