Jump to content


Photo

fine detail green screen


  • Please log in to reply
4 replies to this topic

#1 Niki Mundo

Niki Mundo
  • Basic Members
  • PipPipPip
  • 166 posts
  • Student
  • Los Angeles

Posted 08 October 2007 - 04:28 PM

I know that large props,people and sets can be green screened/chroma-keyed but I was wondering about smaller objects such as a pencil or a coin?

Also what about filming chroma-keyed people from 50-100 feet away to be put into a crowd scene? Any problems?

Thanks!
Niki Mundo
  • 0

#2 Michael Nash

Michael Nash
  • Sustaining Members
  • 3330 posts
  • Cinematographer
  • Pasadena, CA

Posted 08 October 2007 - 04:50 PM

You're limited by the resolution of the original capture, the resolution of the composited image, and the compression of both.

If you're afraid you might lose too much detail in a subject you can always shoot it larger in the frame, and then shrink it into place in the comp. But if detail is too fine to be resolved in the comp anyway, you don't have to go nuts with the "oversampling."
  • 0

#3 Niki Mundo

Niki Mundo
  • Basic Members
  • PipPipPip
  • 166 posts
  • Student
  • Los Angeles

Posted 08 October 2007 - 07:34 PM

OK..what about for a shoot-out scene with gunfire.

Instead of CGI..(I know it can be done easier, but I hate easy)

I go to a range fire a semi-auto in front of a green screen (also paint the weapon green) and then composite the muzzle flash and case ejections onto the final scene.

Would that look right? Or would the detail be too small?
  • 0

#4 Michael Nash

Michael Nash
  • Sustaining Members
  • 3330 posts
  • Cinematographer
  • Pasadena, CA

Posted 08 October 2007 - 07:49 PM

As long as it looks right, what's wrong with "easy?" Maybe what you're after is just something more custom and not "stock" looking.

For things like flame/smoke effects it's not that the edges are too fine, but that there's a level of transparency to the edges. Dealing with transparent matte edges is really a post issue.

Gun flash elements should be easy enough to come by that you don't need to try to create your own. For one thing, the real thing usually doesn't look as "cool" as what you see in the movies, and it takes a munitions expert to alter the charges to get the right flash. And FWIW, transparent matte elements like smoke and fire are better shot against black instead of green.
  • 0

#5 Will Earl

Will Earl
  • Basic Members
  • PipPipPipPip
  • 385 posts
  • Other
  • Wellington, NZ

Posted 10 October 2007 - 07:11 PM

Okay, so I must warn you this is a vfx breakdown for Star Wars fan-film (arghh!), but it does give a idea of how vfx elements are shot and composited.



And this will give you a good idea of how to deal with muzzle flashes in comp...

http://www.videocopi...rial.html?id=38

Hope that helps.
-W
  • 0


Tai Audio

Willys Widgets

New Pro Video - New and Used Equipment

Visual Products

The Slider

Aerial Filmworks

Technodolly

Paralinx LLC

rebotnix Technologies

CineTape

Gamma Ray Digital Inc

Rig Wheels Passport

Glidecam

Media Blackout - Custom Cables and AKS

Metropolis Post

Wooden Camera

CineLab

FJS International, LLC

Abel Cine

Broadcast Solutions Inc

Ritter Battery

Wooden Camera

FJS International, LLC

Metropolis Post

Ritter Battery

Visual Products

Rig Wheels Passport

CineLab

Broadcast Solutions Inc

Technodolly

The Slider

Tai Audio

Glidecam

Abel Cine

CineTape

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Paralinx LLC

Aerial Filmworks

Media Blackout - Custom Cables and AKS

Willys Widgets

rebotnix Technologies