Research

http://idrawgirls.com/tutorials/2011/11/07/how-to-paint-snow-landscape/
http://idrawgirls.com/tutorials/2011/10/31/environmental-concept-art-magma-cliff/
http://idrawgirls.com/tutorials/2011/11/02/how-to-paint-waterfall/
http://idrawgirls.com/tutorials/2011/10/30/what-opacity-setting-i-use-in-digital-painting/