Here is another matte painting tutorial that is very informational. This artist actually paints much of the image from scratch. You can learn a lot from these tutorials that are projects from beginning to end. This kind of image of course works best if you own a tablet, but like many other matte paintings, some of this image is photo compositing as well and not just freehand painting. 20.12.06
Matte Painting Tutorial
Here is another matte painting tutorial that is very informational. This artist actually paints much of the image from scratch. You can learn a lot from these tutorials that are projects from beginning to end. This kind of image of course works best if you own a tablet, but like many other matte paintings, some of this image is photo compositing as well and not just freehand painting. 
