Merge pull request #20961 from 11zouzouzou/dev

WebGLTextures: Set all pixel storage modes for CubeTexture.

src/renderers/webgl/WebGLTextures.js

@@ -709,6 +709,8 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 		state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture );
 
 		_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
+		_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
+		_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
 
 		const isCompressed = ( texture && ( texture.isCompressedTexture || texture.image[ 0 ].isCompressedTexture ) );
 		const isDataTexture = ( texture.image[ 0 ] && texture.image[ 0 ].isDataTexture );