Jump to content


Photo

walking through portal effect?


  • Please log in to reply
10 replies to this topic

#1 dean alexander

dean alexander

    New

  • Basic Members
  • Pip
  • 4 posts
  • Camera Operator

Posted 07 September 2006 - 08:48 AM

hi,
im trying to figure out how to achieve the 'walking through protal' effect like seen on programmes such as 'stargate' etc. Basicaly id like to find out how i can film someone walking through a wall which when interacted with turns to a liquid type effect then be able to walk straight through it. any ideas?
  • 0

#2 Keith Mottram

Keith Mottram
  • Sustaining Members
  • 824 posts
  • Other

Posted 07 September 2006 - 10:43 AM

hi,
im trying to figure out how to achieve the 'walking through protal' effect like seen on programmes such as 'stargate' etc. Basicaly id like to find out how i can film someone walking through a wall which when interacted with turns to a liquid type effect then be able to walk straight through it. any ideas?


post on an fx forum would be a start.... seriously though you will need an experienced 3d crew and a decent post supervisor, who will texture map live action plates onto 3d models that will be manipulated, the depending on how you want the shots to work you will need to do a certain amount of bluescreen as well.

keith
  • 0

#3 Luke Prendergast

Luke Prendergast
  • Sustaining Members
  • 491 posts
  • Cinematographer
  • Victoria Australia

Posted 07 September 2006 - 10:33 PM

Why don't you just use a real portal?
  • 0

#4 Dory Breaux

Dory Breaux
  • Basic Members
  • PipPip
  • 15 posts
  • Producer

Posted 07 September 2006 - 10:51 PM

Why don't you just use a real portal?


If you send me a short clip of the part you want I MIGHT be able to do something with it in 3DS MAX.

Another option (i persionaly LOVE this one) is to have some sort of neon light around the corners of a dorrway and throw some dust in it. its a hit or miss thing and works about 75% of thr time.
  • 0

#5 David Sweetman

David Sweetman
  • Basic Members
  • PipPipPipPip
  • 757 posts
  • Student

Posted 07 September 2006 - 11:35 PM

You could do something like in Terminator... maybe something where you'd shoot the scene with the actor "walking through the portal" then take a clean plate, then cut between the two with some bright flashes. Maybe even shine a light at the camera outside at night and luma-key in the flare. I'd much rather watch a film with these types of methods over one with a liquidy cg portal.
  • 0

#6 Bob Hayes

Bob Hayes
  • Basic Members
  • PipPipPipPip
  • 1087 posts
  • Cinematographer
  • Culver City, California

Posted 08 September 2006 - 01:59 AM

If it?s a Stargate kind of scenario you can lock off the camera and shoot the portal. Then shoot the person walking through the portal and cut the two shots together with the person just through the portal. Then do the best you can to create a portal effect. It could be as simple as a flash of light or as complex as a vortex. It is easy to do if the portal has an actual hole in it. If the portal is solid then you need to green screen the person and shoot it as two separate elements so you can get the person to walk past the plane of the wall. This would be much more complicated.
  • 0

#7 Phil Connolly

Phil Connolly
  • Basic Members
  • PipPipPipPip
  • 378 posts
  • Director
  • London

Posted 08 September 2006 - 04:54 AM

Why don't you just use a real portal?


You have to be careful as some Portals are terrible for fogging film, and the possiblity that an interdimensional hyper beast might come through and eat your crew. :D
  • 0

#8 Phil Connolly

Phil Connolly
  • Basic Members
  • PipPipPipPip
  • 378 posts
  • Director
  • London

Posted 08 September 2006 - 04:57 AM

Why don't you just use a real portal?


You have to be careful as some Portals are terrible for fogging film, and the possiblity that an interdimensional hyper beast might come through and eat your crew. :D
  • 0

#9 Mark Allen

Mark Allen
  • Basic Members
  • PipPipPipPip
  • 591 posts
  • Director
  • Los Angeles

Posted 08 September 2006 - 05:48 AM

Never seen Stargate, but often portal effects are done by shooting the person on greenscreen and then shirnking and screen as they walk though - the quick way. the longer way is rotoing them such that whatever would be through the portal is roto'd first. It's the old "how did they do that?" being answered by "a lot of labor." For any ripples there are 2D and 3D ways of rippling a cleanplate - neither is that complex. then add glows and flashes and viola! portal effect.
  • 0

#10 Sampson Rolen

Sampson Rolen

    New

  • Basic Members
  • Pip
  • 8 posts
  • Cinematographer
  • Minnesota

Posted 28 September 2006 - 12:01 AM

I second Mark Allen. I've used both the shrink and rotoscoping in Shake. Roto works best, but it takes a lot of hours to get it done.

Mark - Nice MTV youth to vote clip!


Sampson Rolen
Timeless Media Inc.
  • 0

#11 David Sweetman

David Sweetman
  • Basic Members
  • PipPipPipPip
  • 757 posts
  • Student

Posted 28 September 2006 - 03:28 PM

You have to be careful as some Portals are terrible for fogging film, and the possiblity that an interdimensional hyper beast might come through and eat your crew. :D


Yeah and make sure you use a Loretzian traversable wormhole, not the kind that are like black holes and smash everything into photons.

Edited by David Sweetman, 28 September 2006 - 03:28 PM.

  • 0


Opal

Glidecam

FJS International, LLC

Gamma Ray Digital Inc

CineLab

Paralinx LLC

CineTape

Rig Wheels Passport

Tai Audio

The Slider

rebotnix Technologies

Visual Products

Ritter Battery

Metropolis Post

Technodolly

Wooden Camera

Willys Widgets

Abel Cine

Broadcast Solutions Inc

Aerial Filmworks

Media Blackout - Custom Cables and AKS

Technodolly

rebotnix Technologies

Paralinx LLC

Wooden Camera

Rig Wheels Passport

Media Blackout - Custom Cables and AKS

Visual Products

Abel Cine

The Slider

Broadcast Solutions Inc

Willys Widgets

Opal

Aerial Filmworks

FJS International, LLC

Ritter Battery

Metropolis Post

Tai Audio

CineLab

Gamma Ray Digital Inc

CineTape

Glidecam