Reset texture state

src/renderers/webgl/WebGLState.js

@@ -668,6 +668,9 @@ THREE.WebGLState = function ( gl, extensions, paramThreeToGL ) {
 
 		compressedTextureFormats = null;
 
+		currentTextureSlot = undefined;
+		currentBoundTextures = {};
+
 		currentBlending = null;
 
 		currentColorWrite = null;