I am making a custom sky tag for Project Warhawk (See Project Warhawk Alpha Update Topic for more on the project.) and I was wondering how do you make the stars in the sky twinkle? (As an example the stars in the dusk and timberland sky tags) Any advice is much appreciated!

Layers and texture translations.


Basically, The stars are on bottom and overtop is a black bitmap with a cloud texture in the alpha. This texture is then translated or rotated; when the alpha sections overlap the stars they go out for that moment before popping back in after the alpha passes.