Are there any new (or at least working) pseudo-3D icon sets anymore

I just need some tips: where can I still find good complete pseudo-3D icon sets for Linux, especially Xfce?

Even when I search for "non-flat icons" on Google, half of the entries say "ultra-flat". Everybody seems in adoration of flatness. Everything is flat.

I have nothing against flat icons as long as I have a choice, but it seems I don't anymore. In fact flatness seemed so logical and obvious that I was glad to adopt it, but after a while I realized something was missing. I never liked excessive skeumorphism in a music player's GUI, but after a while I think it is preferable as far as icons are concerned. Why? Because an "icon" is a symbol, but not a letter; it should be the image of something; but a too-flat icon looks like the image of an image, like the quote of a quote. Or maybe it's just my mind that wants Firefox to have a fox-looking animal in its icon, not just a spot of orange, a folder icon to look like a folder and not just a rectangle.

I think flat icons serve their purpose only as long as we know the non-flat image that they refer to. I notice that my mind needs to know the first anyway in order to use the second, and that it asks for a fraction of a second more to recognize a flat icon for what it is.