car compositing

[Anonymous]

Hello Everyone,

I am about to work on a music video in which the singers want to have 3 cars in the video. A mercedes SLR, Enzo Ferrari, and a 2006 Bentley. We will be modeling all 3 of these cars and customizing each one. I was wondering if i could get some direction as to the best direction on how to composite the cars into the video. The 3d cars will be sitting in the driveway to a real mansion while the singers are doing their thing in front. What would be the best way and workflow to incorporate these 3d models into the scene? I am assuming they would need to shoot 2 shots of video, one with the singers and no cars and then just the same shot with no one in it which we will render the cars in that shot. Any direction and help is appreciated. Thanks.

[uwe_wiesemann]

yes, and make sure you film the backs of the singers and the environment (house, garden, whatever..) as reflections for the cars as well. Either dont move the camera – or else get motioncontrol – otherwise track the cameramovement and match the clean-plate…

regards

Uwe Wiesemann

[drkim]

jribbe1 wrote:

…I am assuming they would need to shoot 2 shots of video, one with the singers and no cars and then just the same shot with no one in it which we will render the cars in that shot…

This would be a really painful way to comp this – as you would have to hand-roto the singers over the cars…

You may want to:

1. have them shoot a clean plate of the mansion (locked off and from various angles)

2. Shoot the group on greenscreen (matching the angles and lighting of the mansion plates)

3. You do a three layer comp of (B to F): the clean plate; the car renders; and the singers.

You may be able to fake the ‘rear’ reflections – flip the greenscreen on H, blur it enough to hide the fact it’s their front, comp it over a “sky ‘n trees” generic plate, and screen/add it to the texture map on the cars. Then the reflections will match the movement in front of the cars.

Good luck…

Kim

[nanuk]

You could also do a difference key of the singers plate and the clean plate. but don´t expect any miracles. the facts, that the shooting will be located outside doesn´t make it better. i would also shoot it with a greenscreen. perhaps you can give the reflection pass to your 3d guys, that they will bring it in and then they put everything splited in passes back to you. so have enought contoll over each pass in the compositing.

Good luck nanuk

[drkim]

I would do this all as a lockoff – I bet by the time you got into motion control… with a hothead, and trackers and everything, it would probably be cheaper to rent the real cars…! 🙂

[hyrlvlrec]

would love to see this when its done! post a link if possible to the shot

[Anonymous]

hopefully they can do the same dance again.. for other pass’s like has been said..

shoot the reverse of them against black.

get the 3d guys to put this on a card next to the cars in the same place. back faces only ( so camera don’t see it.) make the car 100% reflective. thats your reflection pass for the comp.

you should also get a rough enough key of this for a projected shadow.

lots of still pics on set from where the cars will be for reflections.

Chrome ball filmed in place for referance along with a matt 50% grey ball.

I’d really push for greenscreen for the main shoot.

lots of clean back plates to the left/right/up/down from where the band are will allow for some digital moves after in post after…

If you want to get dirty try draping some green over a real car for some closeups… so the actor can lean back onto the car .. the replace with 3d one..

reflection for this could be tricky.. but thats all the fun

😆 😆

hope goes well

si

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