Hello!
I haven't found a solution for my problem, though there are some similar topics here. I wanted to create an outer shadow for a button. The fill of the button was transparent (36%), and I wanted the shadow to have 100% opacity, but that is impossible: there is a dependence between opacity of a block and its shadow's opacity. Here is a picture. May be this is my mistake, anyway I hope to get a solution for that. Thank you!