Hasta La Motion!

Hi, something come up when playing with 3d in nuke. How to positioning 3d obj that match perspective of a still 2d footage (reference image). Let say i have a still image simple showing a cube/box from a certain angle. This is just still image so there’s no chance to use cam tracker to get cam data. So i want to create 3d cube to match this reference image. All i can do is manually adjust translate/rot/scale the object to match the plat. But does anyone know any method or scripts that can automate this process? maybe something like how the lensdistortion node works -> analyze the image to get the undistort one. So in this 3d case , maybe it analyze couple of the straight lines (what should be pararell lines ) to calculate the perspective or vanishing point …. and finally to get the correct cam angle or object position in 3d space.

thanx