Not with what I know how to do. All I had was the 256px PNGs, and placing it into the folder maker seemed to scale down fine.
TL;DR, I'm not good enough yet to help there.
The edge lighting file that @TizianoMad had worked just fine, but the shadow was a little wonky, so I made another one using some of the default Windows icons, then lined it up by referencing the folder designer app. So with that, here is the file for the edge lighting (@TizianoMad's, not mine)...
I already have a recommendation. Would it be possible to add the shadow and edge lighting images to the "Front Folder" layer when a custom color is applied?
The shadow and edge lighting images I'm referring to are from this post.
Note: This would only apply when the custom color is active, as...