Hi,

   in a short animation I would like to turn on/off a second model that is overlapping with the main model. The idea is to show differences by showing/hiding side chains of the second model.

I know I can turn off models with ~modeldisp #1  but I don't know how to do that properly in a perframe statement

turn y 2 180

perframe  "modeldisp #1 "  range 0,1 frames 180  # pseudo code

wait

clearly range does not quite work and $1 is presumably not setup to be ~ or nothing.

I want to turn #1 on/off say every 6 degrees. How can this be done ?

Thanks,

  Lothar