Since I found this floating around the internet, I might as well upload it here.
Back in 2013, when I was at Ladyluck doing outsourcing work, we were extremely lucky to have worked for Sims 4.
EA, sent some of their artists to help us create this concept. This awesome artist, Alex flores alexflores.deviantart.com/
, taught us how to create these concepts using a method which uses simple renders from Maya that we paint over.
It was a really fun project even if I was only able to do a few.