diff --git a/docs/api/en/constants/Textures.html b/docs/api/en/constants/Textures.html
index 8383f66b530b36..fe616ac907203e 100644
--- a/docs/api/en/constants/Textures.html
+++ b/docs/api/en/constants/Textures.html
@@ -556,7 +556,6 @@ <h2>Encoding</h2>
 		<code>
 		THREE.LinearEncoding
 		THREE.sRGBEncoding
-		THREE.GammaEncoding
 		THREE.BasicDepthPacking
 		THREE.RGBADepthPacking
 		</code>
diff --git a/docs/api/en/renderers/WebGLRenderer.html b/docs/api/en/renderers/WebGLRenderer.html
index 3954e06e223bd7..46e9747d194cc4 100644
--- a/docs/api/en/renderers/WebGLRenderer.html
+++ b/docs/api/en/renderers/WebGLRenderer.html
@@ -158,9 +158,6 @@ <h3>[property:Object extensions]</h3>
 		various WebGL extensions are supported.
 		</p>
 
-		<h3>[property:Float gammaFactor]</h3>
-		<p>Default is *2*. </p>
-
 		<h3>[property:number outputEncoding]</h3>
 		<p>Defines the output encoding of the renderer. Default is [page:Textures THREE.LinearEncoding].</p>
 		<p>If a render target has been set using [page:WebGLRenderer.setRenderTarget .setRenderTarget] then renderTarget.texture.encoding will be used instead.</p>
diff --git a/docs/api/ko/constants/Textures.html b/docs/api/ko/constants/Textures.html
index 498edbb6289f79..78299e8301944b 100644
--- a/docs/api/ko/constants/Textures.html
+++ b/docs/api/ko/constants/Textures.html
@@ -550,7 +550,6 @@ <h2>인코딩</h2>
 		<code>
 		THREE.LinearEncoding
 		THREE.sRGBEncoding
-		THREE.GammaEncoding
 		THREE.BasicDepthPacking
 		THREE.RGBADepthPacking
 		</code>
diff --git a/docs/api/zh/constants/Textures.html b/docs/api/zh/constants/Textures.html
index 436d8fab5f0249..60b2d8cd6359a4 100644
--- a/docs/api/zh/constants/Textures.html
+++ b/docs/api/zh/constants/Textures.html
@@ -545,7 +545,6 @@ <h2>编码</h2>
 	<code>
 		THREE.LinearEncoding
 		THREE.sRGBEncoding
-		THREE.GammaEncoding
 		THREE.BasicDepthPacking
 		THREE.RGBADepthPacking
 		</code>
diff --git a/docs/api/zh/renderers/WebGLRenderer.html b/docs/api/zh/renderers/WebGLRenderer.html
index 1473a28e1a79d7..2982250e00ef7f 100644
--- a/docs/api/zh/renderers/WebGLRenderer.html
+++ b/docs/api/zh/renderers/WebGLRenderer.html
@@ -137,9 +137,6 @@ <h3>[property:Object extensions]</h3>
 		[page:WebGLRenderer.extensions.get .extensions.get]方法的包装, 用于检查是否支持各种WebGL扩展
 		</p>
 
-		<h3>[property:Float gammaFactor]</h3>
-		<p>默认是 *2*. </p>
-
 		<h3>[property:number outputEncoding]</h3>
 		<p>定义渲染器的输出编码。默认为[page:Textures THREE.LinearEncoding]</p>
 		<p>如果渲染目标已经使用 [page:WebGLRenderer.setRenderTarget .setRenderTarget]、之后将直接使用renderTarget.texture.encoding</p>
diff --git a/examples/js/shaders/GammaCorrectionShader.js b/examples/js/shaders/GammaCorrectionShader.js
index 04c579dd7eff1d..8a579bdf55119e 100644
--- a/examples/js/shaders/GammaCorrectionShader.js
+++ b/examples/js/shaders/GammaCorrectionShader.js
@@ -34,7 +34,7 @@
 
 			vec4 tex = texture2D( tDiffuse, vUv );
 
-			gl_FragColor = LinearTosRGB( tex ); // optional: LinearToGamma( tex, float( GAMMA_FACTOR ) );
+			gl_FragColor = LinearTosRGB( tex );
 
 		}`
 	};
diff --git a/examples/jsm/nodes/core/NodeBuilder.js b/examples/jsm/nodes/core/NodeBuilder.js
index f3f875d6fc7429..6856b5aa6b74ed 100644
--- a/examples/jsm/nodes/core/NodeBuilder.js
+++ b/examples/jsm/nodes/core/NodeBuilder.js
@@ -4,7 +4,7 @@ import {
 	CubeUVReflectionMapping,
 	CubeUVRefractionMapping,
 	LinearEncoding,
-	GammaEncoding
+	sRGBEncoding
 } from '../../../../build/three.module.js';
 
 import { NodeUniform } from './NodeUniform.js';
@@ -951,7 +951,7 @@ class NodeBuilder {
 
 		if ( encoding === LinearEncoding && this.context.gamma ) {
 
-			encoding = GammaEncoding;
+			encoding = sRGBEncoding;
 
 		}
 
diff --git a/examples/jsm/nodes/utils/ColorSpaceNode.js b/examples/jsm/nodes/utils/ColorSpaceNode.js
index fb07bbcb257d20..35a9691b324ae6 100644
--- a/examples/jsm/nodes/utils/ColorSpaceNode.js
+++ b/examples/jsm/nodes/utils/ColorSpaceNode.js
@@ -1,12 +1,10 @@
 import {
-	GammaEncoding,
 	LinearEncoding,
 	sRGBEncoding
 } from '../../../../build/three.module.js';
 
 import { TempNode } from '../core/TempNode.js';
 import { FunctionNode } from '../core/FunctionNode.js';
-import { ExpressionNode } from '../core/ExpressionNode.js';
 
 class ColorSpaceNode extends TempNode {
 
@@ -100,8 +98,6 @@ class ColorSpaceNode extends TempNode {
 
 ColorSpaceNode.Nodes = ( function () {
 
-	// For a discussion of what this is, please read this: http://lousodrome.net/blog/light/2013/05/26/gamma-correct-and-hdr-rendering-in-a-32-bits-buffer/
-
 	const LinearToLinear = new FunctionNode( /* glsl */`
 		vec4 LinearToLinear( in vec4 value ) {
 
@@ -110,22 +106,6 @@ ColorSpaceNode.Nodes = ( function () {
 		}`
 	);
 
-	const GammaToLinear = new FunctionNode( /* glsl */`
-		vec4 GammaToLinear( in vec4 value, in float gammaFactor ) {
-
-			return vec4( pow( value.xyz, vec3( gammaFactor ) ), value.w );
-
-		}`
-	);
-
-	const LinearToGamma = new FunctionNode( /* glsl */`
-		vec4 LinearToGamma( in vec4 value, in float gammaFactor ) {
-
-			return vec4( pow( value.xyz, vec3( 1.0 / gammaFactor ) ), value.w );
-
-		}`
-	);
-
 	const sRGBToLinear = new FunctionNode( /* glsl */`
 		vec4 sRGBToLinear( in vec4 value ) {
 
@@ -144,8 +124,6 @@ ColorSpaceNode.Nodes = ( function () {
 
 	return {
 		LinearToLinear: LinearToLinear,
-		GammaToLinear: GammaToLinear,
-		LinearToGamma: LinearToGamma,
 		sRGBToLinear: sRGBToLinear,
 		LinearTosRGB: LinearTosRGB
 	};
@@ -154,9 +132,6 @@ ColorSpaceNode.Nodes = ( function () {
 
 ColorSpaceNode.LINEAR_TO_LINEAR = 'LinearToLinear';
 
-ColorSpaceNode.GAMMA_TO_LINEAR = 'GammaToLinear';
-ColorSpaceNode.LINEAR_TO_GAMMA = 'LinearToGamma';
-
 ColorSpaceNode.SRGB_TO_LINEAR = 'sRGBToLinear';
 ColorSpaceNode.LINEAR_TO_SRGB = 'LinearTosRGB';
 
@@ -168,8 +143,6 @@ ColorSpaceNode.getEncodingComponents = function ( encoding ) {
 			return [ 'Linear' ];
 		case sRGBEncoding:
 			return [ 'sRGB' ];
-		case GammaEncoding:
-			return [ 'Gamma', new ExpressionNode( 'float( GAMMA_FACTOR )', 'f' ) ];
 
 	}
 
diff --git a/examples/jsm/renderers/nodes/display/ColorSpaceNode.js b/examples/jsm/renderers/nodes/display/ColorSpaceNode.js
index 5e4257e285f3db..dcaee7c88d6c68 100644
--- a/examples/jsm/renderers/nodes/display/ColorSpaceNode.js
+++ b/examples/jsm/renderers/nodes/display/ColorSpaceNode.js
@@ -4,8 +4,7 @@ import { ShaderNode,
 	pow, mul, add, sub, mix, join,
 	lessThanEqual } from '../ShaderNode.js';
 
-import { LinearEncoding,
-	sRGBEncoding/*, GammaEncoding*/ } from '../../../../../build/three.module.js';
+import { LinearEncoding, sRGBEncoding } from '../../../../../build/three.module.js';
 
 export const LinearToLinear = new ShaderNode( ( inputs ) => {
 
@@ -59,10 +58,6 @@ function getEncodingComponents( encoding ) {
 			return [ 'Linear' ];
 		case sRGBEncoding:
 			return [ 'sRGB' ];
-/*
-		case GammaEncoding:
-			return [ 'Gamma', new CodeNode( 'float( GAMMA_FACTOR )' ) ];
-*/
 
 	}
 
@@ -74,10 +69,7 @@ class ColorSpaceNode extends TempNode {
 
 	static SRGB_TO_LINEAR = 'sRGBToLinear';
 	static LINEAR_TO_SRGB = 'LinearTosRGB';
-	/*
-	static GAMMA_TO_LINEAR = 'GammaToLinear';
-	static LINEAR_TO_GAMMA = 'LinearToGamma';
-*/
+
 	constructor( method, node ) {
 
 		super( 'vec4' );
diff --git a/examples/jsm/shaders/GammaCorrectionShader.js b/examples/jsm/shaders/GammaCorrectionShader.js
index e2f9546e2a53fd..7108187c2067e2 100644
--- a/examples/jsm/shaders/GammaCorrectionShader.js
+++ b/examples/jsm/shaders/GammaCorrectionShader.js
@@ -32,7 +32,7 @@ const GammaCorrectionShader = {
 
 			vec4 tex = texture2D( tDiffuse, vUv );
 
-			gl_FragColor = LinearTosRGB( tex ); // optional: LinearToGamma( tex, float( GAMMA_FACTOR ) );
+			gl_FragColor = LinearTosRGB( tex );
 
 		}`
 
diff --git a/src/Three.Legacy.js b/src/Three.Legacy.js
index d0e71c624b8d17..69ea7487eba24d 100644
--- a/src/Three.Legacy.js
+++ b/src/Three.Legacy.js
@@ -1597,7 +1597,19 @@ Object.defineProperties( WebGLRenderer.prototype, {
 
 		}
 	},
+	gammaFactor: {
+		get: function () {
+
+			console.warn( 'THREE.WebGLRenderer: .gammaFactor has been removed.' );
+			return 2;
+
+		},
+		set: function () {
+
+			console.warn( 'THREE.WebGLRenderer: .gammaFactor has been removed.' );
 
+		}
+	}
 } );
 
 Object.defineProperties( WebGLShadowMap.prototype, {
diff --git a/src/constants.js b/src/constants.js
index 73d66af92ee9e2..70ca9676e8bef3 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -156,7 +156,6 @@ export const TriangleStripDrawMode = 1;
 export const TriangleFanDrawMode = 2;
 export const LinearEncoding = 3000;
 export const sRGBEncoding = 3001;
-export const GammaEncoding = 3007;
 export const BasicDepthPacking = 3200;
 export const RGBADepthPacking = 3201;
 export const TangentSpaceNormalMap = 0;
diff --git a/src/extras/PMREMGenerator.js b/src/extras/PMREMGenerator.js
index 6b9042209af9fe..7ccb4ec1ebde78 100644
--- a/src/extras/PMREMGenerator.js
+++ b/src/extras/PMREMGenerator.js
@@ -2,7 +2,6 @@ import {
 	CubeReflectionMapping,
 	CubeRefractionMapping,
 	CubeUVReflectionMapping,
-	GammaEncoding,
 	LinearEncoding,
 	LinearFilter,
 	NoToneMapping,
@@ -45,8 +44,7 @@ const MAX_SAMPLES = 20;
 
 const ENCODINGS = {
 	[ LinearEncoding ]: 0,
-	[ sRGBEncoding ]: 1,
-	[ GammaEncoding ]: 6
+	[ sRGBEncoding ]: 1
 };
 
 const _flatCamera = /*@__PURE__*/ new OrthographicCamera();
@@ -904,13 +902,9 @@ function _getEncodings() {
 
 				return value;
 
-			} else if ( inputEncoding == 1 ) {
-
-				return sRGBToLinear( value );
-
 			} else {
 
-				return GammaToLinear( value, 2.2 );
+				return sRGBToLinear( value );
 
 			}
 
diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index 10a9d47af5a5d6..62a63a7be24b9d 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -110,7 +110,6 @@ function WebGLRenderer( parameters = {} ) {
 
 	// physically based shading
 
-	this.gammaFactor = 2.0;	// for backwards compatibility
 	this.outputEncoding = LinearEncoding;
 
 	// physical lights
diff --git a/src/renderers/shaders/ShaderChunk/encodings_pars_fragment.glsl.js b/src/renderers/shaders/ShaderChunk/encodings_pars_fragment.glsl.js
index ad208608d69ed2..67d34ea063a13c 100644
--- a/src/renderers/shaders/ShaderChunk/encodings_pars_fragment.glsl.js
+++ b/src/renderers/shaders/ShaderChunk/encodings_pars_fragment.glsl.js
@@ -1,18 +1,9 @@
 export default /* glsl */`
-// For a discussion of what this is, please read this: http://lousodrome.net/blog/light/2013/05/26/gamma-correct-and-hdr-rendering-in-a-32-bits-buffer/
 
 vec4 LinearToLinear( in vec4 value ) {
 	return value;
 }
 
-vec4 GammaToLinear( in vec4 value, in float gammaFactor ) {
-	return vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );
-}
-
-vec4 LinearToGamma( in vec4 value, in float gammaFactor ) {
-	return vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );
-}
-
 vec4 sRGBToLinear( in vec4 value ) {
 	return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );
 }
diff --git a/src/renderers/webgl/WebGLProgram.js b/src/renderers/webgl/WebGLProgram.js
index bc64fb54866abc..a4461c692e9077 100644
--- a/src/renderers/webgl/WebGLProgram.js
+++ b/src/renderers/webgl/WebGLProgram.js
@@ -1,7 +1,7 @@
 import { WebGLUniforms } from './WebGLUniforms.js';
 import { WebGLShader } from './WebGLShader.js';
 import { ShaderChunk } from '../shaders/ShaderChunk.js';
-import { RGBFormat, NoToneMapping, AddOperation, MixOperation, MultiplyOperation, CubeRefractionMapping, CubeUVRefractionMapping, CubeUVReflectionMapping, CubeReflectionMapping, PCFSoftShadowMap, PCFShadowMap, VSMShadowMap, ACESFilmicToneMapping, CineonToneMapping, CustomToneMapping, ReinhardToneMapping, LinearToneMapping, GammaEncoding, sRGBEncoding, LinearEncoding, GLSL3 } from '../../constants.js';
+import { RGBFormat, NoToneMapping, AddOperation, MixOperation, MultiplyOperation, CubeRefractionMapping, CubeUVRefractionMapping, CubeUVReflectionMapping, CubeReflectionMapping, PCFSoftShadowMap, PCFShadowMap, VSMShadowMap, ACESFilmicToneMapping, CineonToneMapping, CustomToneMapping, ReinhardToneMapping, LinearToneMapping, sRGBEncoding, LinearEncoding, GLSL3 } from '../../constants.js';
 
 let programIdCount = 0;
 
@@ -27,8 +27,6 @@ function getEncodingComponents( encoding ) {
 			return [ 'Linear', '( value )' ];
 		case sRGBEncoding:
 			return [ 'sRGB', '( value )' ];
-		case GammaEncoding:
-			return [ 'Gamma', '( value, float( GAMMA_FACTOR ) )' ];
 		default:
 			console.warn( 'THREE.WebGLProgram: Unsupported encoding:', encoding );
 			return [ 'Linear', '( value )' ];
@@ -389,9 +387,6 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 	const envMapModeDefine = generateEnvMapModeDefine( parameters );
 	const envMapBlendingDefine = generateEnvMapBlendingDefine( parameters );
 
-
-	const gammaFactorDefine = ( renderer.gammaFactor > 0 ) ? renderer.gammaFactor : 1.0;
-
 	const customExtensions = parameters.isWebGL2 ? '' : generateExtensions( parameters );
 
 	const customDefines = generateDefines( defines );
@@ -443,8 +438,6 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 
 			parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',
 
-			'#define GAMMA_FACTOR ' + gammaFactorDefine,
-
 			'#define MAX_BONES ' + parameters.maxBones,
 			( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
 			( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',
@@ -593,8 +586,6 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 
 			customDefines,
 
-			'#define GAMMA_FACTOR ' + gammaFactorDefine,
-
 			( parameters.useFog && parameters.fog ) ? '#define USE_FOG' : '',
 			( parameters.useFog && parameters.fogExp2 ) ? '#define FOG_EXP2' : '',
 
diff --git a/src/renderers/webgl/WebGLPrograms.js b/src/renderers/webgl/WebGLPrograms.js
index ba31649ba754ea..28cadb34d1050d 100644
--- a/src/renderers/webgl/WebGLPrograms.js
+++ b/src/renderers/webgl/WebGLPrograms.js
@@ -327,7 +327,6 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			getProgramCacheKeyParameters( array, parameters );
 			getProgramCacheKeyBooleans( array, parameters );
 			array.push( renderer.outputEncoding );
-			array.push( renderer.gammaFactor );
 
 		}
 
diff --git a/test/unit/src/constants.tests.js b/test/unit/src/constants.tests.js
index 0f2145a1777735..b3c581fb729822 100644
--- a/test/unit/src/constants.tests.js
+++ b/test/unit/src/constants.tests.js
@@ -130,7 +130,6 @@ export default QUnit.module( 'Constants', () => {
 		assert.equal( Constants.TriangleFanDrawMode, 2, 'TriangleFanDrawMode is equal to 2' );
 		assert.equal( Constants.LinearEncoding, 3000, 'LinearEncoding is equal to 3000' );
 		assert.equal( Constants.sRGBEncoding, 3001, 'sRGBEncoding is equal to 3001' );
-		assert.equal( Constants.GammaEncoding, 3007, 'GammaEncoding is equal to 3007' );
 		assert.equal( Constants.BasicDepthPacking, 3200, 'BasicDepthPacking is equal to 3200' );
 		assert.equal( Constants.RGBADepthPacking, 3201, 'RGBADepthPacking is equal to 3201' );