Has far has I know it is pretty much talk to talk!

It does have a different fell if you make everything in a image, but the industry has reached a level of perfectionism that it is pretty much not sustainable to do all by yourself 

I remember a video that I saw people calling Dylan Cole a cheater, he is one of the best artists at the moment, and the reaction of Dylan Cole was:

"Anything goes in matte painting; it just got to look good"