SPRINGFIELD -- When MGM Springfield opens in September, the custom carpet in the casino's poker room will have a tire tread pattern, a nod to Springfield's early automotive history as home to the Duryea brothers and a Rolls-Royce factory.

That details will have been put there by a 21st century Springfield business, Specs Design Group, an interior design firm based at 17 Hampden St., about eight blocks north of the $960 million MGM complex under construction in the South End.

"It's going to be subtle," said Elise Irish, owner and principal of Specs Design Group. "But once you notice it, you will see it all round. 'Oh, that looks like the dashboard of a car.'"

With dark woodwork and upholstery in deep, rich colors, parent company MGM Resorts International has revealed interior designs for the hotel rooms and public lobby spaces. The unveiling came during a meeting Thursday of the Massachusetts Gaming Commission.

MGM Resorts International hired six interior design firms to design the 760,000 square feet of interior space it will have in Springfield. MGM shared a few images of what the interior is expected to look like.

Specs Design Group will design the casino's poker room, various retail locations including the hotel lobby sundry shop, all the interiors for MGM Springfield's corporate offices in the former MassMutual building at 95 State St., the employee dining room and a performance venue.

The hotel lobby sundry shop will use architectural details salvaged from buildings MGM demolished to make room for its complex.

"It's not going to look like the usual place you go to buy a toothbrush," Irish said.

All the designers were given the general theme MGM wants to keep throughout the property, and then they were encouraged to let their creativity fly within those parameters.

"It is a little bit urban. It has a lot of Springfield history sprinkled through," Irish said in an interview arranged by MGM. "It feels like it fits within Springfield."

She said designers were encouraged to incorporate icons of Springfield and Western Massachusetts history. There will be images of Dr. Seuss, whose real life creator, Theodor Seuss Geisel, was born and grew up here, game maker Milton Bradley and Amherst poet Emily Dickinson.

"Our overall vision embodies the city's rich history while simultaneously developing downtown Springfield into a true entertainment destination," said Michael Mathis, president of MGM Springfield, in a prepared statement. "Understanding the complexities of a landmark project like this, we carefully selected design partners who shared our sensibilities and will transform MGM Springfield into an entertainment beacon for the commonwealth."

With four full-time and three part-time designers, Specs Design Group has created architectural interiors since 1987. It counts Taylor Street Dental Associates in Springfield (the offices of Dr. David I. Peck) as well as Easthampton Savings and United Bank as clients. It designed interiors for Hoosac Hall at the Massachusetts College of the Liberal Arts in North Adams and has national accounts with Jones New York and other retailers.

Specs Design Group recently merged with Kaestle Boos Associates in Boston.

Irish said she and her team will have worked with MGM for about three years by the time the casino opens, having been hired in December 2015.

"You are not going to feel like you are in Vegas. But it is going to be spectacular," she said.

The other design firms are: