I am an avid sci-fi reader and watcher, with a background in Architecture that included training in design and sketching. I would provide you with initial rough sketches of buildings, spaceships, and robot or alien characters based on your description on the second day, and based on your feedback finalize and "computerize" the drawings. I have my own copy of photoshop and am quite comfortable turning hand sketches into professional looking, high resolution graphics. At the moment I can focus on this job completely, so I can provide you with a three day turn around time as long as there are no delays in communication. Please let me know if you would like any further information from me. I am still getting set up with Freelancer, but I will be working on my portfolio while you are reviewing bids.