I have a star field that I made with the fractal noise plugin. I want to make the stars twinkle, so I created a standard fractal map and keyframed the evolution, then duplicated the star layer and assigned the fractal layer to use it as a track matte.
The stars now randomly come in and out, but I don't want them to go all the way out. Any ideas how i can make them get dimmer, but now completely fade out?
Up the gamma on your matte layer.