Fitting yes. I think that's one of the thing that lack the most in diorama making. You've got some terrain, some guys standing, some vehicles.. But the only real attempt at making the whole fit is to make some foot or tracks traces on the floor.
I try to go a bit beyond that lately, first by completely integrating the ice in my Pam Azova, this time by integrating *people* on the vehicle. But then it's fig sculpting and this is not my strong point.
Anyway, here's a close to slip guy as integrated on the rear of the T-26
More figure sculpting (there is 4 on the workbench right now)