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Walking Through Solid Walls

Posted: Wed, 18th Jun 2003, 4:01am

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Raymund

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Hello out there! I need some advise on how to go about doing an effect that allows a person to pass through solid wall like in stargate, quantum leap, etc. I understand that is more of a masking procedure but I'd like to find out how to make the masking more fluid and natural. Thanks.
Posted: Wed, 18th Jun 2003, 5:48pm

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rmw

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What programs do you have?
Posted: Wed, 18th Jun 2003, 6:00pm

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Hajiku_Flip

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I'm just sitting around the house so I'll try to put together a test shot for you, then post a tutorial on how I did it. I'll be using Premiere, Photoshop 6.0, and After Effects 5. Should be up in a few hours or so.
Posted: Fri, 20th Jun 2003, 2:31am

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Raymund

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Thanks for the reply and the upcoming tutorial. I've got Commotion PRO (still learning how to use it), Photoshop 7.0, Adobe Premiere 6.5 and Adobe After Effects. wink
Posted: Fri, 20th Jun 2003, 5:20am

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Hajiku_Flip

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Tutorial is almost finished. I got the easy one done (facing a wall from the side) but I'm still trying to figure out how to accomplish a good head on technique. Its perty hard and I'm not sure exactly how I want to go about it yet. But keep up your hopes, I'll have it soon! biggrin
Posted: Fri, 20th Jun 2003, 9:54am

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Craig

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I have in the past been thinking of how to do a head on version and the way I was thinking was to...

film the actor from the front.

film the background separately.

Use AE - background as the lower layer and the actor above it.

then the hard work of using the masking tools to reveal the actor at places where there would be areas further forward to start with and then reveal the whole actor.

I never liked the Quantum Leap versions myself as they never quite went according to the contours of Al's body - from what I can remember smile

I might try doing this actually - I'll post it if I have something that looks half decent razz
Posted: Mon, 23rd Jun 2003, 4:30pm

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Craig

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This is an example of a porthole effect - http://www.cjproductions.co.uk/movies/porthole.mov

The blue screen work isn't that good as it's on a blue 'notice board' material but it shows the effect.

The file is just under 1MB

biggrin
Posted: Mon, 23rd Jun 2003, 4:37pm

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Hajiku_Flip

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I've been working with it, and I'm just postitive there has to be an easier way then to choose small masking points. I'm just not sure how yet smile. For my example, I filmed me walking into my room, and filmed it blank with the door shut so that there will be some depth to me when I walk through it. You can only go so far when you stand against a wall. Hmmm... I'll keep racking my brain and searching.
Posted: Mon, 23rd Jun 2003, 4:56pm

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Craig

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Hi Hajiku - you mentioned you'd already done a side view - do you have any examples?
Posted: Mon, 23rd Jun 2003, 5:02pm

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Hajiku_Flip

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Yeah, let me export it and get it up, then I'll post a link.
Posted: Mon, 23rd Jun 2003, 5:22pm

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Exclamation

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Craig wrote:

This is an example of a porthole effect - http://www.cjproductions.co.uk/movies/porthole.mov

The blue screen work isn't that good as it's on a blue 'notice board' material but it shows the effect.

The file is just under 1MB

biggrin
Where'd the transition to make the portal appear come from?
Posted: Mon, 23rd Jun 2003, 5:32pm

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Hajiku_Flip

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Bah, Scope servers aren't working again. They'e had alot of troubles latley. I'm going to see if I can find an alternate web hosting site for the clip. Edit: Great, now I'm having playback problems. Argh...Working on it though. I want to get it up as soon as I can though so you guys can get an idea, and perhaps make it better.

Last edited Mon, 23rd Jun 2003, 6:42pm; edited 2 times in total.

Posted: Mon, 23rd Jun 2003, 6:04pm

Post 13 of 29

Craig

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Exclamation wrote:


Where'd the transition to make the portal appear come from?
I could tell you ... but then I'd have to kill you!

or

I could tell you then I'd have to get lots of force for it smile

biggrin
Posted: Mon, 23rd Jun 2003, 8:28pm

Post 14 of 29

Exclamation

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Tell me for 2 force points (I ain't got dat much force so thats all I can spare). I think it is an older version of Pinnacle studio, cos I remember it from a older version, but then again I am probably wrong.
Posted: Mon, 23rd Jun 2003, 10:47pm

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Craig

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biggrin

You are wrong - There's a nice and easy online tute as well!

Care to up the stakes? twisted
Posted: Tue, 24th Jun 2003, 1:48am

Post 16 of 29

Raymund

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Great porthole effect. Was the process simple but tedious? It just came to me that the matte creation of the person walking through could be handled by some morphing software like elastic reality or something similar. For example, morphing the shape of the person's nose tip to the full face shape and create a matte from it for alpha keying the actual footage against a wall (or water wall). In your case did you do it manually?
Posted: Tue, 24th Jun 2003, 1:54am

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Hajiku_Flip

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Hmm...morphing is certainly a possiblity that I never considered. But it would still be awkward...yeeeek. tard
Posted: Tue, 24th Jun 2003, 5:14pm

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Craig

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The porthole effect was simple and easy - and I think was also effective.

Having my sister in-law walking through the porthole was the tedius part.
It was all done by hand and although there was tweening in AE, I had to set up several different masks for it.
Posted: Tue, 24th Jun 2003, 6:15pm

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wpl

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I will give you a +2 if you write a tut. for these guys (when I get my tokens back).
Posted: Tue, 24th Jun 2003, 6:29pm

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Exclamation

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tokens ain't coming back
Posted: Tue, 24th Jun 2003, 6:30pm

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Aculag

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Aren't they? I thought tarn said they were. Just for gold members...
Posted: Tue, 24th Jun 2003, 6:39pm

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Exclamation

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A voting system: yes, tokens: no.

Just voitng freely, i think. Don't quote me on this.
Posted: Tue, 24th Jun 2003, 11:49pm

Post 23 of 29

Craig

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You can still do 'force transfer' I beleive smile

A tute will be on the way.

biggrin
Posted: Wed, 25th Jun 2003, 4:46pm

Post 24 of 29

anonymous

If I transfered you force I would loose my pretty yellow bar tard

I don't know about that
Posted: Wed, 25th Jun 2003, 6:39pm

Post 25 of 29

Craig

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Ah - so that's how force transfer works! it's not just a case of moving your force tokens then? (although they currently don't exist at the moment surprised)
Posted: Tue, 8th Jul 2003, 8:33pm

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shadu

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Hajiku_Flip did you made your tutorial for the wall crossing effect?

Shadu
Posted: Tue, 8th Jul 2003, 8:47pm

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Hajiku_Flip

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Unfortunately I never got around to finishing it sad. I was trying to find a new method that differs from Craig's way, and I had written down a few ideas and began to test them. Although my computer started going buggy and I reformatted it to fix the problems, and I forgot to back up all my test files mad . I'm really sorry I couldn't get it up for you, wish I hadn't of been so swamped so I had would've had more time to work on it. Perhaps I can find time to work on something smile
Posted: Tue, 8th Jul 2003, 11:24pm

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Obi

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Hey! No hard feelings Flip. Lets all just look at this logically. (Mini-Tutorial)

If someone were to walk through a wall, you would progressively see them pass through the wall, right? Obviously this isnt possible, so we'd have to somehow make it seem as though physical matter is passing through physical matter. Theres two ways you could portray this:

1) Have the actor/actress walking forward towards the camera against a blue/greenscreen (For compositing with the wall footage at a later date). You can then create masks to block out parts of the actors body which haven't passed through the wall yet. So, if the actor walks with quite a big step, you would maybe leave part of the foot and lower leg, delete the rest with a mask and then begin to reveal more of the leg as the actor comes closer. Then you would just continue, masking the parts that haven't passed through yet, till they have passed through the wall, and are standing still.

2) You could create a 3d model of the actor (To scale) and make it seem they had some kind of power, allowing them to pass through the wall (Create a shadow-matte wall and have the 3d model step through it).

I mean, to be honest it's all up to you how you set up and execute the shot, those were just some quickfire suggestions.

Hope it goes well!
Posted: Wed, 9th Jul 2003, 12:35am

Post 29 of 29

anonymous

I tried the masking methode and this is very long. And I can't make blue screen also so this raise the difficulty. Any other method?

shadu