ok ... I think I found a solution.. this was faster than I thought. The solution for a sheer glitter trough fabrics I could use a 2nd layer for material.. in this example I used the glitter above and just added a 2nd layer with a simple color and a 0,5 transparency with fall off ... I like it :D I think I can work with this.

left: bachground light

right: Superfly Paramount