The meeting between the director and researcher Georges Gagner{\'e} and the
digital artist and researcher C\'edric Plessiet at Paris 8 University through
experiments crossing live performance and video game led to the development of
tools from game techniques video and dedicated to theatrical experimentation on
a mixed stage involving physical actors and avatars. The genesis of
AvatarStaging setup and AKN_Regie tool is detailed through the various
research-creations on which they were formalized and used. AKN_Regie is a
plugin of the videogame engine Unreal Engine, programmed in blueprint, and
dedicated to real time 3D previsualization and avatar direction.Comment: in French languag