Hahaha yeah it took me quite a while to get used to painting upright as well, I used to paint on the floor all the way until I was a teenager. Then I decided to stream my process live, so the best way I thought for the camera to see would be using the easel.
The whole process took approximately 18 hours to complete and I used about 15 reference images from Starcraft II and Dune to get different angles and shapes I was picturing in my head!
I am so glad you liked it! The Marine would definitely not go down with out a fight thats for sure! haha