Xukmi+fx+shaders

Standard chromatic aberration shifts red and blue by 1-2 pixels. Xtreme shifts them by up to 50 pixels, creating a 3D anaglyph effect (without the glasses) or a drunken, double-vision blur.

Searching for implies you are tired of the generic "Sharpen + Vibrance" presets that plague the Nexus Mods front page. xukmi+fx+shaders

Shaders are usually written in a variant of C, specific to the graphics API you are using. For example, GLSL (OpenGL Shading Language) for OpenGL, HLSL (High-Level Shading Language) for DirectX, and SPIR-V for Vulkan. Standard chromatic aberration shifts red and blue by

Begin with basic shaders and gradually move on to more complex ones. GLSL (OpenGL Shading Language) for OpenGL

#version 330 core out vec4 FragColor;

The mod is designed to provide "better visuals" for 3D character scenes.