This is beautiful work. A tip though. Set you dpi in your resolution settiong to 100. 72 is actually net viewing size but I find 100 works to show a bit more detail. When it's so huge, it's hard to enjoy the piece as a whole and also runs the risk of choking slower machines so you may be losing audience. Just a friendly piece of advice XD

This is really beautiful work and I love how you use color and lighting.