From dfca2bd4748b00245225c9e4d8ba0ef7374c9b36 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Thu, 27 Jan 2022 17:27:57 -0500
Subject: [PATCH] Material: Remove alphaWrite.

---
 examples/js/loaders/GLTFLoader.js    | 1 -
 examples/jsm/loaders/GLTFLoader.js   | 1 -
 src/loaders/MaterialLoader.js        | 1 -
 src/materials/Material.js            | 3 ---
 src/renderers/webgl/WebGLProgram.js  | 2 +-
 src/renderers/webgl/WebGLPrograms.js | 6 ++++--
 6 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/examples/js/loaders/GLTFLoader.js b/examples/js/loaders/GLTFLoader.js
index f90b9e1c3bb18..40f1ce6ce9008 100644
--- a/examples/js/loaders/GLTFLoader.js
+++ b/examples/js/loaders/GLTFLoader.js
@@ -2885,7 +2885,6 @@
 			} else {
 
 				materialParams.transparent = false;
-				materialParams.alphaWrite = false;
 
 				if ( alphaMode === ALPHA_MODES.MASK ) {
 
diff --git a/examples/jsm/loaders/GLTFLoader.js b/examples/jsm/loaders/GLTFLoader.js
index aa5f60a1bed23..f71bda96aba7c 100644
--- a/examples/jsm/loaders/GLTFLoader.js
+++ b/examples/jsm/loaders/GLTFLoader.js
@@ -3178,7 +3178,6 @@ class GLTFParser {
 		} else {
 
 			materialParams.transparent = false;
-			materialParams.alphaWrite = false;
 
 			if ( alphaMode === ALPHA_MODES.MASK ) {
 
diff --git a/src/loaders/MaterialLoader.js b/src/loaders/MaterialLoader.js
index 2af3967528bfc..97571fde5280d 100644
--- a/src/loaders/MaterialLoader.js
+++ b/src/loaders/MaterialLoader.js
@@ -100,7 +100,6 @@ class MaterialLoader extends Loader {
 		if ( json.depthTest !== undefined ) material.depthTest = json.depthTest;
 		if ( json.depthWrite !== undefined ) material.depthWrite = json.depthWrite;
 		if ( json.colorWrite !== undefined ) material.colorWrite = json.colorWrite;
-		if ( json.alphaWrite !== undefined ) material.alphaWrite = json.alphaWrite;
 
 		if ( json.stencilWrite !== undefined ) material.stencilWrite = json.stencilWrite;
 		if ( json.stencilWriteMask !== undefined ) material.stencilWriteMask = json.stencilWriteMask;
diff --git a/src/materials/Material.js b/src/materials/Material.js
index 420ce960c9322..9c118f8abc002 100644
--- a/src/materials/Material.js
+++ b/src/materials/Material.js
@@ -53,7 +53,6 @@ class Material extends EventDispatcher {
 		this.shadowSide = null;
 
 		this.colorWrite = true;
-		this.alphaWrite = true;
 
 		this.precision = null; // override the renderer's default precision for this material
 
@@ -312,7 +311,6 @@ class Material extends EventDispatcher {
 		data.depthTest = this.depthTest;
 		data.depthWrite = this.depthWrite;
 		data.colorWrite = this.colorWrite;
-		data.alphaWrite = this.alphaWrite;
 
 		data.stencilWrite = this.stencilWrite;
 		data.stencilWriteMask = this.stencilWriteMask;
@@ -448,7 +446,6 @@ class Material extends EventDispatcher {
 		this.shadowSide = source.shadowSide;
 
 		this.colorWrite = source.colorWrite;
-		this.alphaWrite = source.alphaWrite;
 
 		this.precision = source.precision;
 
diff --git a/src/renderers/webgl/WebGLProgram.js b/src/renderers/webgl/WebGLProgram.js
index 88965b4e00cb2..1842833d90b61 100644
--- a/src/renderers/webgl/WebGLProgram.js
+++ b/src/renderers/webgl/WebGLProgram.js
@@ -654,7 +654,7 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 			( parameters.toneMapping !== NoToneMapping ) ? getToneMappingFunction( 'toneMapping', parameters.toneMapping ) : '',
 
 			parameters.dithering ? '#define DITHERING' : '',
-			parameters.alphaWrite ? '' : '#define OPAQUE',
+			parameters.transparent ? '' : '#define OPAQUE',
 
 			ShaderChunk[ 'encodings_pars_fragment' ], // this code is required here because it is used by the various encoding/decoding function defined below
 			getTexelEncodingFunction( 'linearToOutputTexel', parameters.outputEncoding ),
diff --git a/src/renderers/webgl/WebGLPrograms.js b/src/renderers/webgl/WebGLPrograms.js
index bcadf4d763c52..714b25ad42941 100644
--- a/src/renderers/webgl/WebGLPrograms.js
+++ b/src/renderers/webgl/WebGLPrograms.js
@@ -176,9 +176,10 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			specularIntensityMap: !! material.specularIntensityMap,
 			specularColorMap: !! material.specularColorMap,
 
+			transparent: material.transparent,
+
 			alphaMap: !! material.alphaMap,
 			alphaTest: useAlphaTest,
-			alphaWrite: material.alphaWrite || material.transparent,
 
 			gradientMap: !! material.gradientMap,
 
@@ -325,7 +326,6 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 		array.push( parameters.toneMapping );
 		array.push( parameters.numClippingPlanes );
 		array.push( parameters.numClipIntersection );
-		array.push( parameters.alphaWrite );
 
 	}
 
@@ -447,6 +447,8 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			_programLayers.enable( 21 );
 		if ( parameters.decodeVideoTexture )
 			_programLayers.enable( 22 );
+		if ( parameters.transparent )
+			_programLayers.enable( 23 );
 
 		array.push( _programLayers.mask );