0
$\begingroup$

Hi guys I want to combine a 3d motion-tracked object with some footage I plan to shoot.

-I want to film someone walking "infront and around" the 3d tracked object. -Any ideas on how I can achieve this any links to any tutorials?

I Appreciate the help

$\endgroup$
1
  • $\begingroup$ You may want to look for Ian Hubert on YouTube. He has a couple of tutorials that will get you started. $\endgroup$ Aug 21 at 13:59
0
$\begingroup$

use a cobble floor. make sure you have floor information for what you want to track (this is crucial, you see some VFX making of use half tennis balls, you can use anything as long as it contrasts with the floor when you move your camera). To occlude the actor (if he/she doesn't cast shadows), track your 3d object, generate the scene, use your actor as foreground and background, in the middle (of the compositing layers in the compositor) you'll use your 3d object. So when the actor pass in front of the object, it shows in front (actor is top layer, 3d object is behind). When your actor is behind the object, make sure your 3d object is composed at the top and the actor as the background. Then tere is the "middle zone" where you'll need to occlude certain parts first (hands, legs, head, etc..) you'll need to rotoscope them using the mask node. Here's a short video on how to use them: https://youtu.be/fziA1Vw4L98

You need to plan your shot and movement. If you need your actor to do interactions with the object, you'll need to green screen him/her and bring the footage sequence as image plane. Then proceed to do compositing directly on the 3d track generated scene from your footage. You need to know your sensor's size to match lens distortion.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.