I've added a new page of resources to my blog >here<. It's a lengthy list of links that I find useful. They're sources of much information and inspiration.
These are graphics I've created recently as part of an interesting side project. The game itself is still a work in progress, but it has been a fun challenge. I find it interesting how a small sample of tiles can be repeated to form an endless variety of landscapes.
Below is an isometric block. The challenge is in creating repeatable textures that will seamlessly align.