Flash and swift 3d stick animation help

hi everybody.

maybe this shouldnt be in this forum but i need help when adding characters to a swift 3d movie in flash… for example right now im working on a sniper scene…
i got a movie of a building seen by a fly by camera and then the camera just stops where the sniper should be (which i want to make using flash) but the problem is that i dont know how to resize the character so it looks real in the scene cause the camera keeps moving and the stick-figure should change size you know what i mean right (if the camera moves far from the building the stickfigure should look smaller etc.) but when the camera moves to the right or left up and down how do i fit the stick figure to it??? :thumb: hope you can help me

if you dont understand something im sorry cause english its not my foreign leanguaje