“The Source engine is DirectX 9 only which does not allow texture sharing and is not supported by any of the new VR APIs ,” Marulu told me.
Two of the new members-who go by pseudonyms Marulu and Street Rat-are responsible for developing a key hack that would make it possible to bring Half-Life 2 to modern VR headsets. Speaking to the team behind the Half-Life 2: VR mod, we learned more about the technical issues which halted development of the original mod several years back.