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Combsution and 3d cameras

 
n°787
signet
Posted on 07-20-2005 at 11:53:03 AM  profilanswer
 

I have been playing with importing cameras into combustion.
 
This is great.  
 
Although i am not totally sure on how or why i want to have moving camera in a 3d workspace.
 
Here is what i thought it could be used for and the work flow i am trying to implment.
 
current work flow

1. Match Move my shot in MM3.1
2. Import camera into 3ds max and track past inserted 3d object.
3. usually at this stage I combine as 2d composite in combustion and rotoscope mask any objects that move in front of my cg element.
 
 
I am thinking that importing the 3d camera into combustion will remove the need to rotoscope masks. As the camera should move through the scene. All i should need to do is draw a mask once, place it correctly in the  footage then the MM camera should track past it.  
 
I am thinking this because if i was rotoscoping masks as i usually do, I am in fact manully 2d tracking  the camera movements and animating objects that remain stationary in the scene e.g. lamposts etc. this seems crazy when MatchMover has already calculated the camera positon and rotation.
 
This hit me very hard after i went through 1200 frames painfully in combustion masking objects in the footage that passed in front of my CG element.
 
does anyone use combustion to import MM cameras into 3d scenes for this purpose and are there some best practices or guides tips etc .
 
thanks in advance.
 
Mike

n°788
Ronald
Posted on 07-20-2005 at 05:32:23 PM  profilanswer
 

Hello,
 
This sounds as a good workflow for 3D masking. It's definitely the fastest way for long rotoscoped sequences.  
Let us know how it works for you
 
Bye.

n°789
signet
Posted on 07-21-2005 at 05:08:25 PM  profilanswer
 

hi ronald,
 
yeah this sound like the best way of doing it and i am testing alot right now before my next big project comes up.
 
I just posted on vfxtalk on this subject.
 
the attached image shows that i can get a paint layer to sit in a 3d space in combustion. The problem is... if i want to paint on the layer and trace an object in the footage I cant because when you select the paint operator and begin to paint you enter the operator and can no longer see the background footage to trace.
 
I know this is now of your realms as MM support, But i am interested to hear from anyone who has ideas on my current problem.


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