Grau has conceived new scientific tools for the humanities/digital humanities, he managed the project "Immersive Art" of The German Research Foundation (DFG) whose team started developing in 1998 the first international archive for digital art written on an open source platform at the Danube-University Krems and has since been followed up by a number of spin-off projects.
Grau je osmislio nove znanstvene alate za humanističke znanosti / digitalne humanističke znanosti, upravljao je projektom "Immersive art" institucije "The German Research Foundation (DFG)", čiji tim je 1998 g. počeo razvijati prvu međunarodnu arhivu za digitalnu umjetnost pisanu na open source platformi na sveučilištu Danube-University Krems i otada je prate brojni spin-off projekti.