Applying Color Grading with Lookup Textures

Learners will use the color grading volume override to apply cinematic LUTs and adjust tonal ranges for a professional artistic aesthetic.

In this lesson, you will learn how to elevate your project’s visual identity by applying cinematic Lookup Textures (LUTs) through the Color Grading volume override.

The Power of LUTs

A Lookup Texture is essentially a color-mapping tool: it tells the engine to take every specific color value in your current frame and transform it into a new value based on a reference image. Instead of manually adjusting sliders for Hue, Saturation, and Contrast, a LUT allows you to import complex, professional-grade artistic aesthetics—like the "teal and orange" cinematic look or retro film grain—directly into your post-processing stack.

Implementing the Workflow

To use a LUT, ensure your URP asset has Post-Processing enabled. Within your Global or Local Volume, add the Color Grading override. Follow these steps:

Set Mode to External: In the Color Grading settings, locate the Mode dropdown and change it from Low Definition Range to External.
Assign the Texture: A field named Lookup Texture will appear. Drag your pre-generated LUT (usually a 256x16 PNG or a 1024x32 texture) into this slot.
Control Intensity: Use the Contribution slider to blend the effect. A value of 0 means no effect, while 1 applies the full artistic transformation defined by your texture.

Adjusting Tonal Ranges

Beyond the LUT itself, the Color Grading override provides the Tonemapping setting. Setting this to ACES (Academy Color Encoding System) is industry standard for a filmic, high-dynamic-range look. It helps prevent highlights from "clipping" to pure white, ensuring your LUT’s colors feel integrated into the lighting rather than just slapped on top of the image.

When working with stylized shaders—such as those you developed for Toon Shading—remember that LUTs affect the final output after your shaders have rendered. This makes them the perfect "final polish" to unify the color palette across different materials and VFX, ensuring your screen space effects and particles exist within the same visual world.

Key Takeaway: Lookup Textures act as a powerful, non-destructive filter that maps your scene's color range to a professional aesthetic, providing an efficient way to achieve consistent, film-grade visual unity across your entire project.