Wow ! Interesting !
Yes, As some one said reinstall shake first
and according to shake user manual
use iff or rgb(sgi) as your inputs so as to increase the interactivity.
these files doesnt create cache ( time saved )
other file formats take a lot of time to scrub thro ( pic, tga, tif etc )
you know why?
" go thro the topic, Image Formats That Support tTmp Files
in
Shake User Manual.pdf at page 168-169 "
Good Luck
thanks
Nishok A