how to make objects spread out in 3D space look connected with moving cam?

[Danny Parsons]

I know that there ARE such things as greenscreen treadmills… No idea what they would cost to hire, and I wouldn’t expect it would be particularly easy to convert one yourself (or cheap, for that matter: you’d probably have to cover the whole tread in greenscreen fabric, which itself is expensive)…

You could try using a regular treadmill, then create a loop (try morphing techniques) of the subject walking that’s just long enough so that people won’t notice that it’s a loop, but just short enough that you don’t decide to shoot yourself before you finish rotoscoping around her feet on each of the necessary frames…

Good luck,

DP

[Scott Geersen]

if you’re trying to do a greenscreen in a small room, and you’re going to make a loop out of it anyway, then by all means use the screen, but be prepared to do a lot of roto. i doubt you’ll get decent lighting for the screen in a small room, and if it’s a small space she’ll be casting annoying shadows all over the screen. use it, key what you can, be prepared to do a lot of roto and the eventuality that you may not be able to get a decent key at all (with no 3rd party plugins and dv it will be hard).

[Bret Williams]

After precomposing, if you want the precomposed comp to be a 3D object in the new comp, click the collapse transformations box. It now essentially becomes a 3D object that utilizes the camera and lights in the new comp. Very cool. You can essentially build entire models this way.

[Bret Williams]

Didn’t you say it was going to be a 3D forest of sorts? As long as she walks behind a tree or something every few seconds, then you can loop the footage at that point.

I don’t know about the feet. Spray paint your treadmill. Or get some of those cool shoes with the wheels build in, tie a rope to her, and have her walk in place. 🙂

[Corbin Gross]

I’m not sure what the final effect is that you’re looking for, but, what if you shoot her from different angles in the room. Then As she’s walking through he forrest you can just piece together the footage and it will just look like any shot of somebody walking through someplace and around corners and what not.