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 Post subject: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:09 pm 
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Death Star Gunner
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Ok, hope there are some stereo geeks out there.

I'm not too thrilled with the results of my camera test. I'm really happy with the way the tv lighting effect turned out, but less happy with the shitty cameras making everything hard to see effect. Right now I'm using a couple of standard def handycams. I'm thinking of adding black lines to all the edges to make everything more defined. That was my plan all along, but haven't got round to it yet. I also think it'll look better once I've got the lighting sussed. This shot just has ambient lighting, the angle of the key lighting I had was too close to the angle of the camera, so it flattened everything. Oops.

Also, I was a bit lazy aligning the cameras, which is adding vertical parallax that's doing bad things for the 3d. I still don't know if these cameras are the way to go. I'm using them on widescreen setting so I can crop into 4:3 and use the sides for aligning the 3d without losing any vertical resolution. The problem is that this exaggerates the steppy artifacts on high contrast edges, because widescreen DV uses super wide pixels to maintain the same data rate as 4:3. I could buy myself a nice digital SLR camera and set it up on a sliding rig so I only need one. Won't work for live action, but as Cymae pointed out, stop motion doesn't require both eyes to be taken at the same time. I'm worried about the jitter that could introduce though. I'd have to slide it into exactly the same position each time. At least with the current two camera setup the error is constant. I think it's either this or beam splitters, but those have issues too.

Thoughts? Suggestions? Need red-cyan glasses?


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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:24 pm 
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Looking pretty good, the 3D is nice and strong. Not sure about the atmos though, the smoke is a bit whispy.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:30 pm 
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My initial thought is that the sliding camera rig wouldnt work with stopmotion because of the reason you have pointed out. Unless you are incredibly patient and pedantic and have LOADS of time on your hand to reshoot the same scene many times to get it right. The shaky cam with a normal stopmotion shoot is one thing, but combining that with a constantly shifting '3d effect' would make your eyes bleed (imo)

The effect you have at the moment is really nice, I especially like how the smoggy smokey stuff feels like it has depth aswell.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:30 pm 
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Looks like me and Cymae have conflicting ideas about the smoke ;)

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:32 pm 
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Laz wrote:
Looks like me and Cymae have conflicting ideas about the smoke ;)

I didn't say it's not cool and 3d, just said for atmos it's a bit whispy :P

And you would be correct about the jiterryness but that would depend on whether your shots were static or moving and how you constructed the rig. I'm thinking something that slides to the end on both sides, so you just shove it to the very end. You would evidently have to anchor the rig properly though.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:38 pm 
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Yes it is! That's another issue I need to deal with. Smoke machine fog isn't as diffused as I thought it would be. It also tends to rise more than dry ice fog, since it's warmer. This isn't good since my set is on the floor. I'm thinking of finding some way to enclose and or raise the set to keep the fog in place so it'll diffuse without drifting to the ceiling. I do like the dimension it adds at the moment, but it is going to need to be less whispy in order to work with stop motion.

I am also not keen to make eyeballs bleed.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:41 pm 
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Wether you move the camera after the set is taken or not is completely beside the point. You will still have to slide the camera back and forth for everyframe.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 10:47 pm 
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If you have a really solid rig, its obviously doable :)

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 11:08 pm 
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:P

can you enclose the set in a big box or something to keep the smoke inside and just cut holes for the lights and camera?

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 11:29 pm 
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Well, the set is a big box, but it has no top so I can bounce lights off the walls and let it leak in the top for ambient lighting. It's also missing a forth wall like the set of friends, because that's where the cameras are. I could chuck a wall behind the cameras where the live audience would sit I guess.

Maybe with a transparent ceiling I could attempt to keep the atmos pretty well contained. I knew I should've gone for that extra value roll of glad wrap.

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 Post subject: Re: Stereo camera test
PostPosted: Wed Dec 02, 2009 11:53 pm 
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cant you just use dry ice? :?

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 Post subject: Re: Stereo camera test
PostPosted: Thu Dec 03, 2009 12:08 am 
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Laz wrote:
cant you just use dry ice? :?


But if he used dry ice, it would mean he'd wasted the money he paid for the smoke machine :P

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 Post subject: Re: Stereo camera test
PostPosted: Thu Dec 03, 2009 12:38 am 
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how about staging some kind of play OR rave/party (which i am invited too). then it wouldnt be wasted.

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 Post subject: Re: Stereo camera test
PostPosted: Thu Dec 03, 2009 1:24 am 
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Oh, I wouldn't call it a waste... and I'll be throwing that rave as soon as I can get some vocoder software to play nicely with my stylophone.

I have used dry ice before and got some pretty good results from it, but it only lasts a couple of days in a chilly bin, which then loses its inner lining to freeze damage, then if you're not done you have to go back to BOC to get some more and they ask you not to make dry ice bombs with it even though you're pretty sure your mates are gonna take some off you and do this anyway and there's nothing you can do to stop them... This has been less of a problem since I left Otago, but still.

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 Post subject: Re: Stereo camera test
PostPosted: Fri May 07, 2010 4:06 pm 
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After a crazy long hiatus, I'm working on this project again.

Really happy with the way the GH1 is performing. Dynamic interaxial (the camera pulls out of the tv and everything gets friggin more 3d as it does so!) shot should be done over the weekend. Still haven't figured out a way to use it in the shots where characters animate though.

Anyway, I broke my home made GH1 remote so that shot isn't looking very stereo just yet. I do however have a nice stereo window violation to show off. Look at the face! The bottom of the frame won't look funny if you look at the face! When it animates it doesn't violate for long enough to be a bother anyway.


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