Monty Oum, a Web-based animator best known for his work with Rooster Teeth, has died, the production studio announced on its website. He was 33.

Rooster Teeth released the news in a blog post, three days following a post that said Oum was in critical condition and that his recovery was questionable. The post says Oum entered a coma from a severe allergic reaction during a “simple medical procedure.”

Oum was best known for his animated fight scenes in the “Halo”-inspired Web series “Red vs. Blue” and anime Web series “RWBY.”

To honor Oum’s creative impact, the production studio asked that those who knew or followed Oum “do something creative” and “use your imagination to make the world a better place in any way that you can.” The studio also announced it would not be releasing a new video today.

The blog post on Rooster Teeth’s homepage reads:

“Our friend, inspiration and co-worker Monty Oum passed away yesterday afternoon at 4:34 PM surrounded by people who loved him very much. Ten days ago Monty suffered a severe allergic reaction during a simple medical procedure that left him in a coma. Although he fought bravely, his body was not able to recover. During his time in the hospital he was well cared for and never in pain at any time.

Monty is survived by his wife Sheena, his father Mony, his brothers Woody, Sey, Chivy and Neat, and his sisters Thea and Theary, as well as a countless number of fans and friends. We were so proud to be a part of his life and we will miss him greatly.

Your generosity during the hours after the public statement on Friday will help his family deal with the costs of his care and his passing. You made an incredible difference during a difficult time and we cannot thank you enough.

As for honoring Monty, we will do that in our own way. In lieu of flowers or gifts, we ask that you simply do something creative. Use your imagination to make the world a better place in any way that you can. If you know Monty like we do, then you know he would certainly be doing that if he were able to.

Monty was 33 years old.

We love you, Monty.”