Feather

Alpha mask of a feather I modeled. The feather actually sort of looked like crap, but the silhouette was great! So I decided to share. It's in .PNG format, but if you require another format for whatever you're doing, feel free to drop me a line.

This format works fine as an alpha mask in Blender 3D (but you have to use the color socket, not the alpha socket, for some reason, but it does exactly what it should when you do).