Artist Mark “M.D.” Bright, who co-created Quantum and Woody and was a longtime artist at DC and Marvel, has died. He was 68 years old.

Bright was born in 1955. After graduating from the Pratt Institute in 1978, he became a teacher while also doing some comic work. He drew a few issues of Thor before Walter Simonson’s run, then he drew the Falcon miniseries. Bright became the regular artist on Power Man and Iron Fist in the mid-1980s.

He became the regular artist on Iron Man at the book’s milestone 200th issue, and would provide the art during the important Armor Wars storyline. Near the end of his time on Iron Man, Bright became the artist on Solo Avengers.

Bright started working with DC in the late ‘80s, drawing an issue of Batman, then he was the artist on the Green Lantern feature in Action Comics Weekly (he also co-plotted the series). He drew several issues of G.I. Joe: A Real American Hero, worked on some backup stories in Captain America, and Green Lantern: Emerald Dawn. After providing art in the follow-up series, Green Lantern: Emerald Dawn II, he became the artist on the new ongoing Green Lantern series.

In the early ‘90s, he created trading card art for G.I. Joe and the Green Lantern cards in the DC lines. Bright launched Valor at DC then became an early artist at Milestone Media, working on Icon. Then he and longtime collaborator Christopher Priest to create Quantum and Woody at Valiant.

After that, Bright filled in on Black Panther and the A. Bizarro miniseries, he drew the Marville series in the early 2000s, and created the comic, Level Path. Outside of comics, he worked in TV and film as a storyboard artist.