For the past two weeks, a team of muralists has been transforming a brick wall inside the new Canopy by Hilton into a canvas for a signature piece of artwork. “It’s two floors and probably 60 feet across,” said Taylor Gallegos, a San Diego muralist who installed the work. “They gave me the full color renderings and the sizing and scale, and then it’s my job to get that on the wall proportionally and with accurate colors.”