It is a fascinating look at the early days of the series and some of the initial concepts.
The art, posted on Rhodes’ blog, includes designs dating back to the series’ origins. It covers concepts about Tali and what her face looked like under the mask, an interesting story twist involving Shepard and a creepy looking creation of the Mass Effect 2 boss.
Matt Rhodes said about his role as a concept artist “The role of a Concept Artist is the role of an explorer, tasked with charting a world without sunlight. You start off with your reference and research. These are well established base camps.
“They’re well lit, highly populated and safe. The better your reference the better your bearings will be. The artist’s job is to start at base camp with a bag of torches and run furiously out into the darkness. Every doodle, sketch, painting and storyboard is a torch lit somewhere out in the black. You mostly find weeds and rocks out there. But if you keep pushing you sometimes find a rich landscape that can hopefully become a new basecamp.”
You can enjoy his concept art in the link below including some concept art for Dragon Age as well. It is an interesting look through his process.