Updated builds

build/three.js

@@ -18708,7 +18708,14 @@
 			const levelScale = Math.pow(2, -level);
 			const width = Math.floor(texture.image.width * levelScale);
 			const height = Math.floor(texture.image.height * levelScale);
-			const glFormat = utils.convert(texture.format);
+			let glFormat = utils.convert(texture.format);
+
+			if (capabilities.isWebGL2) {
+				// Workaround for https://bugs.chromium.org/p/chromium/issues/detail?id=1120100
+				if (glFormat === _gl.RGB) glFormat = _gl.RGB8;
+				if (glFormat === _gl.RGBA) glFormat = _gl.RGBA8;
+			}
+
 			textures.setTexture2D(texture, 0);
 
 			_gl.copyTexImage2D(_gl.TEXTURE_2D, level, glFormat, position.x, position.y, width, height, 0);

build/three.module.js

@@ -25505,7 +25505,17 @@ function WebGLRenderer( parameters ) {
 		const levelScale = Math.pow( 2, - level );
 		const width = Math.floor( texture.image.width * levelScale );
 		const height = Math.floor( texture.image.height * levelScale );
-		const glFormat = utils.convert( texture.format );
+
+		let glFormat = utils.convert( texture.format );
+
+		if ( capabilities.isWebGL2 ) {
+
+			// Workaround for https://bugs.chromium.org/p/chromium/issues/detail?id=1120100
+
+			if ( glFormat === 6407 ) glFormat = 32849;
+			if ( glFormat === 6408 ) glFormat = 32856;
+
+		}
 
 		textures.setTexture2D( texture, 0 );