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mrdoob · Jan 16, 2025 · 1e332df · 1e332df
1 parent f7db671
commit 1e332df
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Showing 2 changed files with 28 additions and 6 deletions.
diff --git a/src/renderers/common/Renderer.js b/src/renderers/common/Renderer.js
@@ -1855,6 +1855,9 @@ class Renderer {
 
 		}
 
+		// #30329
+		renderContext.clearColorValue = this._clearColor;
+
 		this.backend.clear( color, depth, stencil, renderContext );
 
 		if ( renderTarget !== null && this._renderTarget === null ) {

diff --git a/src/renderers/webgl-fallback/WebGLBackend.js b/src/renderers/webgl-fallback/WebGLBackend.js
@@ -698,8 +698,17 @@ class WebGLBackend extends Backend {
 
 		if ( descriptor === null ) {
 
+			const clearColor = this.getClearColor();
+
+			// premultiply alpha
+
+			clearColor.r *= clearColor.a;
+			clearColor.g *= clearColor.a;
+			clearColor.b *= clearColor.a;
+
 			descriptor = {
-				textures: null
+				textures: null,
+				clearColorValue: clearColor
 			};
 
 		}
@@ -714,13 +723,23 @@ class WebGLBackend extends Backend {
 
 		if ( clear !== 0 ) {
 
-			const clearColor = this.getClearColor();
+			let clearColor;
 
-			// premultiply alpha
+			if ( descriptor.clearColorValue ) {
 
-			clearColor.r *= clearColor.a;
-			clearColor.g *= clearColor.a;
-			clearColor.b *= clearColor.a;
+				clearColor = descriptor.clearColorValue;
+
+			} else {
+
+				clearColor = this.getClearColor();
+
+				// premultiply alpha
+
+				clearColor.r *= clearColor.a;
+				clearColor.g *= clearColor.a;
+				clearColor.b *= clearColor.a;
+
+			}
 
 			if ( depth ) this.state.setDepthMask( true );