When a rendering algorithm has created a pixel array of radiance values the
task of producing an image is not yet completed. In fact, to visualize the
result the radiance values still have to be mapped to luminances, which ca
n be reproduced by the used display. This step is performed with the help o
f tone reproduction operators. These tools have mainly been applied to stil
l images, but of course they are just as necessary for walkthrough applicat
ions, in which several images are created per second. In this paper we illu
minate the physiological aspects of tone reproduction for interactive appli
cations. It is shown how tone reproduction can also be introduced into inte
ractive radiosity viewers, where the tone reproduction continuously adjusts
to the current view of the user. The overall performance is decreased only
moderately, still allowing walkthroughs of large scenes.