Hey @nicknightshade thanks glad you like it :)
Yeah I painted it in one sitting, recording was 76mins long so about 80mins total as I forgot to hit record for the first few marks. Classic :D
I just use what ever layering makes sense at the time. The other alien above for example had about 8 to 10 layers but there's reasons for that :) Will write up a post on that one day. I taught myself how to paint on canvas as a young teenager so guessing it's now kinda instinctual :)