I have recently discovered a simple method for creating low-resolution textures with GIMP. In this post, I will share that method with you.
http://shelbysblogk.blogspot.com/2011/09/tutorial-creating-low-res-textures-in.html
great tutorial, simple, in GIMP
Other tutorials:
Some Pixel Art Tutorials (by SolarLune):
http://c55.me/minetest/forum/viewtopic.php?id=643
Pixel Art : Sword in One minute with The Gimp (by DarkDooxe)
http://c55.me/minetest/forum/viewtopic.php?id=697
[PhotonBlog] 16×16 Pixel Art Tutorial
http://minetest.net/forum/viewtopic.php?pid=22116#p22116
