mrdoob · mrdoob · Dec 2, 2025 · Dec 2, 2025 · Dec 2, 2025 · Dec 4, 2025
diff --git a/examples/jsm/effects/OutlineEffect.js b/examples/jsm/effects/OutlineEffect.js
@@ -135,7 +135,6 @@ class OutlineEffect {
 			'	#include <tonemapping_fragment>',
 			'	#include <colorspace_fragment>',
 			'	#include <fog_fragment>',
-			'	#include <premultiplied_alpha_fragment>',
 
 			'}'
 

diff --git a/examples/jsm/lines/LineMaterial.js b/examples/jsm/lines/LineMaterial.js
@@ -396,7 +396,6 @@ ShaderLib[ 'line' ] = {
 			#include <tonemapping_fragment>
 			#include <colorspace_fragment>
 			#include <fog_fragment>
-			#include <premultiplied_alpha_fragment>
 
 		}
 		`

diff --git a/examples/jsm/materials/LDrawConditionalLineMaterial.js b/examples/jsm/materials/LDrawConditionalLineMaterial.js
@@ -119,7 +119,6 @@ class LDrawConditionalLineMaterial extends ShaderMaterial {
 				#include <tonemapping_fragment>
 				#include <colorspace_fragment>
 				#include <fog_fragment>
-				#include <premultiplied_alpha_fragment>
 			}
 			`,
 

diff --git a/examples/jsm/materials/MeshGouraudMaterial.js b/examples/jsm/materials/MeshGouraudMaterial.js
@@ -303,7 +303,6 @@ const GouraudShader = {
 			#include <tonemapping_fragment>
 			#include <colorspace_fragment>
 			#include <fog_fragment>
-			#include <premultiplied_alpha_fragment>
 			#include <dithering_fragment>
 
 		}`

diff --git a/examples/screenshots/webgl_loader_ldraw.jpg b/examples/screenshots/webgl_loader_ldraw.jpg
diff --git a/examples/screenshots/webgl_materials_blending.jpg b/examples/screenshots/webgl_materials_blending.jpg
diff --git a/examples/webgl_watch.html b/examples/webgl_watch.html
@@ -129,7 +129,8 @@
 								metalness: 0, roughness: 0,
 								iridescence: 0.3,
 								clearcoat: 1.0,
-								blending: THREE.AdditiveBlending
+								blending: THREE.AdditiveBlending,
+								premultipliedAlpha: true
 							} );
 
 							ready = true;

diff --git a/manual/en/indexed-textures.html b/manual/en/indexed-textures.html
@@ -319,7 +319,6 @@ <h1>Indexed Textures for Picking and Color</h1>
     vec3 outgoingLight = reflectedLight.indirectDiffuse;
     #include &lt;envmap_fragment&gt;
     gl_FragColor = vec4( outgoingLight, diffuseColor.a );
-    #include &lt;premultiplied_alpha_fragment&gt;
     #include &lt;tonemapping_fragment&gt;
     #include &lt;colorspace_fragment&gt;
     #include &lt;fog_fragment&gt;

diff --git a/manual/fr/indexed-textures.html b/manual/fr/indexed-textures.html
@@ -319,7 +319,6 @@ <h1>Textures Indexées pour la Sélection et la Couleur</h1>
     vec3 outgoingLight = reflectedLight.indirectDiffuse;
     #include &lt;envmap_fragment&gt;
     gl_FragColor = vec4( outgoingLight, diffuseColor.a );
-    #include &lt;premultiplied_alpha_fragment&gt;
     #include &lt;tonemapping_fragment&gt;
     #include &lt;colorspace_fragment&gt;
     #include &lt;fog_fragment&gt;

diff --git a/manual/ja/indexed-textures.html b/manual/ja/indexed-textures.html
@@ -299,7 +299,6 @@ <h1>圧縮テクスチャのピッキングとカラー</h1>
     vec3 outgoingLight = reflectedLight.indirectDiffuse;
     #include &lt;envmap_fragment&gt;
     gl_FragColor = vec4( outgoingLight, diffuseColor.a );
-    #include &lt;premultiplied_alpha_fragment&gt;
     #include &lt;tonemapping_fragment&gt;
     #include &lt;colorspace_fragment&gt;
     #include &lt;fog_fragment&gt;

diff --git a/manual/ko/indexed-textures.html b/manual/ko/indexed-textures.html
@@ -266,7 +266,6 @@ <h1>피킹과 색상에 인덱스 텍스처 사용하기</h1>
     vec3 outgoingLight = reflectedLight.indirectDiffuse;
     #include &lt;envmap_fragment&gt;
     gl_FragColor = vec4( outgoingLight, diffuseColor.a );
-    #include &lt;premultiplied_alpha_fragment&gt;
     #include &lt;tonemapping_fragment&gt;
     #include &lt;colorspace_fragment&gt;
     #include &lt;fog_fragment&gt;

diff --git a/manual/zh/indexed-textures.html b/manual/zh/indexed-textures.html
@@ -291,7 +291,6 @@ <h1>使用纹理索引来拾取和着色</h1>
     vec3 outgoingLight = reflectedLight.indirectDiffuse;
     #include &lt;envmap_fragment&gt;
     gl_FragColor = vec4( outgoingLight, diffuseColor.a );
-    #include &lt;premultiplied_alpha_fragment&gt;
     #include &lt;tonemapping_fragment&gt;
     #include &lt;colorspace_fragment&gt;
     #include &lt;fog_fragment&gt;

diff --git a/src/renderers/shaders/ShaderChunk/opaque_fragment.glsl.js b/src/renderers/shaders/ShaderChunk/opaque_fragment.glsl.js
@@ -7,5 +7,17 @@ diffuseColor.a = 1.0;
 diffuseColor.a *= material.transmissionAlpha;
 #endif
 
+#ifdef PREMULTIPLIED_ALPHA
+
+// Convert to sRGB, apply premultiplied alpha, convert back to linear.
+// This ensures correct blending in sRGB framebuffers.
+vec3 srgb = sRGBTransferOETF( vec4( outgoingLight, 1.0 ) ).rgb;
+srgb *= diffuseColor.a;
+gl_FragColor = vec4( sRGBTransferEOTF( vec4( srgb, 1.0 ) ).rgb, diffuseColor.a );
+
+#else
+
 gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+#endif
 `;
diff --git a/src/renderers/shaders/ShaderLib/linedashed.glsl.js b/src/renderers/shaders/ShaderLib/linedashed.glsl.js
@@ -70,7 +70,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 
 }
 `;
diff --git a/src/renderers/shaders/ShaderLib/meshbasic.glsl.js b/src/renderers/shaders/ShaderLib/meshbasic.glsl.js
@@ -109,7 +109,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/meshlambert.glsl.js b/src/renderers/shaders/ShaderLib/meshlambert.glsl.js
@@ -117,7 +117,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/meshmatcap.glsl.js b/src/renderers/shaders/ShaderLib/meshmatcap.glsl.js
@@ -105,7 +105,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/meshphong.glsl.js b/src/renderers/shaders/ShaderLib/meshphong.glsl.js
@@ -119,7 +119,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/meshphysical.glsl.js b/src/renderers/shaders/ShaderLib/meshphysical.glsl.js
@@ -217,7 +217,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/meshtoon.glsl.js b/src/renderers/shaders/ShaderLib/meshtoon.glsl.js
@@ -111,7 +111,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
 }

diff --git a/src/renderers/shaders/ShaderLib/points.glsl.js b/src/renderers/shaders/ShaderLib/points.glsl.js
@@ -81,7 +81,6 @@ void main() {
 	#include <tonemapping_fragment>
 	#include <colorspace_fragment>
 	#include <fog_fragment>
-	#include <premultiplied_alpha_fragment>
 
 }
 `;