second Proffit experiment

real life
immersive VR simulation of real life
same response, lots of overestimation
picture on monitor
diff response, more correct response
frames - not it

immersive VR simulation of picture on monitor
end state identical with VR sim of RL
but - matched *picture* reponse
don't overestimate much if you *think* it's a projection

  Dixon, M. W. & Proffitt, D. R. (2002). Overestimation of heights in virtual reality is 
  influenced more by perceived distal size than by the 2-D versus 3-D 
  dimensionality of the display. Perception 31, 103-112.