In terms of doing art-for-hire, if you show you can draw something from observation, it shows you have the discipline to take direction.
Last year I was canvassing background artists for Blackwell Deception, which like all Blackwell games is very urban with lots of city buildings and such. I was so impressed with one artist's portfolio that I hired him on the spot. His portfolio was full of gorgeous, imaginative fantasy landscapes - forests, mountains, quaint little villages, and other environments that defied classification. The guy had talent, but the guy couldn't draw a building to save his life. The results were a horrible mashup of google-image photos and Photoshop filters. Suffice to say, the artist didn't last long. :-/
Last year I was canvassing background artists for Blackwell Deception, which like all Blackwell games is very urban with lots of city buildings and such. I was so impressed with one artist's portfolio that I hired him on the spot. His portfolio was full of gorgeous, imaginative fantasy landscapes - forests, mountains, quaint little villages, and other environments that defied classification. The guy had talent, but the guy couldn't draw a building to save his life. The results were a horrible mashup of google-image photos and Photoshop filters. Suffice to say, the artist didn't last long. :-/