mabcosmic
I just got done posting a prototype card of "The Sun" on my blog. It uses public domain textures only and the colors turned out a LOT bolder than I intended it to. Still, I think it's pretty good for an art class flunkie using MS Paint (I have yet to master GIMP).
http://mabcosmic.blogspot.com/2016/05/the-sun.html
http://mabcosmic.blogspot.com/2016/05/the-sun.html