Despite his enthusiasm for open source code, Carmack revealed in 2011 that he had no interest in licensing the technology to the mass market. Beginning with Wolfenstein 3D, he felt bothered when third-party companies started "pestering" him to license the id tech engine, adding that he wanted to focus on new technology instead of providing support to existing ones. He felt very strongly that this was not why he signed up to be a game programmer for; to be "holding the hands" of other game developers. Carmack commended Epic Games for pursuing the licensing to the market beginning with Unreal Engine 3. Even though the said company has gained more success with its game engine than id Software over the years, Carmack had no regrets by his decision and continued to focus on open source until his departure from the company in 2013.