Work devising the structure for Imaginary Evidence began with approaches developed for other interactive works, most notably, Nightwalks. It is, perhaps, the very approach to structure that resulted in the abandoning of earlier interfaces.

The idea behind the structure was described by the company as follows:

investigate a space
for your curiosity you are awarded with a journey
from that journey, you see another space
which affords you entrance to make some decisions of your own
those decisions deliver shaped/definable information
and then return you to a room... from which you may continue the process.

 

Early Structure from Nightwalks