Chromatic Aberration

The Chromatic Aberration effect splits color along boundaries in an image into their red, green, and blue channels. This reproduces the effect a real-world camera produces when light refracts and causes the wavelengths to disperse in the lens.

Unity provides support for red/blue and green/purple fringing. You can define fringing colors by using an input texture.

Scene with Chromatic Aberration.

Properties

Property	Function
Spectral Lut	Select the texture used for a custom fringing color. When left empty, Unity will use the default texture.
Intensity	Set the strength of the Chromatic Aberration effect.
Fast Mode	Use a faster variant of Chromatic Aberration effect for improved performance.

Details

Chromatic Aberration uses a Spectral Lut input for custom fringing. Four example spectral textures are provided in the repository:

• Red/Blue (Default)
• Blue/Red
• Green/Purple
• Purple/Green

You can create custom spectral textures in any image editing software. While the resolution size of spectral textures are not limited, small sizes like the 3x1 textures provided work best.

You can achieve a rougher effect by manually setting the Filter Mode of the input texture to Point (no filter) in the Texture Import Settings window.

Performance

The performance of the Chromatic Aberration effect depends on its Intensity value. If the Intensity value is high, the render uses more samples to render smooth chromatic aberrations. This makes the process take more time.

Fast Mode is the quickest mode and recommended where possible. However, it's not as smooth as the regular mode.

Requirements

• Shader Model 3