Revert "Clean up."

This reverts commit d7e56f1512a5ceecc2951765569768213977e0a1.

src/renderers/shaders/ShaderChunk/clipping_planes_fragment.glsl

@@ -1,9 +1,11 @@
 #if NUM_CLIPPING_PLANES > 0
 
+	vec4 plane;
+
 	#pragma unroll_loop
 	for ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {
 
-		vec4 plane = clippingPlanes[ i ];
+		plane = clippingPlanes[ i ];
 		if ( dot( vViewPosition, plane.xyz ) > plane.w ) discard;
 
 	}
@@ -15,7 +17,7 @@
 		#pragma unroll_loop
 		for ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {
 
-			vec4 plane = clippingPlanes[ i ];
+			plane = clippingPlanes[ i ];
 			clipped = ( dot( vViewPosition, plane.xyz ) > plane.w ) && clipped;
 
 		}