Fixes #4674: Facade quads should not keep their original cull-faces if they're moved away

from the block face.

src/main/java/appeng/client/render/cablebus/FacadeBuilder.java

@@ -258,7 +258,9 @@ public class FacadeBuilder {
 
                     for (Box box : holeStrips) {
                         emitter.fromVanilla(quad.getVertexData(), 0, false);
-                        emitter.cullFace(cullFace);
+                        // Keep the cull-face for faces that are flush with the outer block-face on the
+                        // side the facade is attached to, but clear it for anything that faces inwards
+                        emitter.cullFace(cullFace == side ? side : null);
                         emitter.nominalFace(quad.getFace());
                         interpolator.setInputQuad(emitter);