Through photoshop web template i found one interesting problem with multiple layers blending.
In the picture you can see screenshot of layout. Of course color is not part of it, just without color you could not see it.
Bottom part is how it looks default, before i marge all layers or save it for web (PNG 24, transparent). But when i save or marge, opacity settings for each layer change, so it looks terrible. (Upper part of screenshot)
I was looking for some decent solutions, but after hours still nothing...