Alright. I think I'm pretty much done with this one. I'll be moving onto designing the astronaut starting tomorrow or sometime after that.
For this final step, I basically just added in some photographic elements into the image in order to apply texture and also some subtle lights. I also changed some architecture so that it wasn't too Roman-esque. I've attached my reference sheet as well and I think it's also worth mentioning that I was looking at Khang Le and Jaime Jones' work.