---
title: "Filter Shader"
url: "https://help.maxon.net/c4d/en-us/Content/html/XSLAFILTER.html"
section_path: "Material Manager > Classic Materials > Classic material > Channel Shaders > Filter Shader"
element_id: "XSLAFILTER"
description: "The Filter shader filters another shader or a bitmap. You can use it to adjust a shader or bitmap's brightness, contrast, hue, saturation, gamma, gradient …"
---

# Filter Shader

The Filter shader filters another shader or a bitmap. You can use it to adjust a shader or bitmap's brightness, contrast, hue, saturation, gamma, gradient curves, etc.

The Filter shader is especially useful for adjusting HDRI textures. For example, high-contrast HDRIs with bright lights usually cause flickering in the animation when rendering GI (Image Base Lighting). You can quickly resolve this problem by adjusting the Gamma value.