STEREO ON NUKE and Glasses

[Anonymous]

Hi.
My questions concerns stereo projects on nuke. Do you render differently the images according how the film would be screenned (the use of polarized glasses OR Dolby 3D glasses) ?

For example, for a screening in 3D Xpand or Dolby 3D ( that implies the use of active liquid crystal shutter glasses that quickly block the views of each eye alternatively.), what do u need to delivery as a final image?
Anaglyth image (as for the red/blue glass where the two views are mixed) or u need to give them the two view separtly with just a join node ???

Another point, I have red that in the case of 3D Xpand METHOD, u never see the two left/write view in the same time on the screen as for others screening method******** Is that thrue?
The old fashon way to do 3d view (with the red/blue glasses) u loose a lot of quality but with the dolby 3D, they say it is the best way to get little loose of lights or orignal color, and avoiding ghost images.

When you know that the movie you are working on will be screenned with Dolby 3D technology,
what is the pipe? the same?
When you work on your computer with the footage, you just need a regular red/blue glasses with Anaglyth view on nuke to simulate how it gonna look like with active liquid crystal shutter glasses??????

[amit Dang]

In Nuke you always are outputting a full color left and right eye master. The different methods you describe are acts of projection and only occur when the film is projected. A 3D digital master is a dual steam of full color left and right movies. The cinema will get a master setup for their projectors.

[Charmain Saunders]

thanks for your quick aswer.
ok you render left and right eye separtly.
BUT why chekin the 3d effect of our work on nuke with ANAGLYTH for all the screening option.

To be clear i don t understand why u check your images on your motinor with blue/red glasses if at the end it won t be projected like that (crystal shutter glasses)….
Do you mean that we put the anaglyth node, in all cases, because what you gonna have on the screen with all the screening methods would look more or less the same?!

[claudio antonelli]

The biggest issue in 3d is disparity between the two eyes. You can check all your depth issues with red-blue glasses, and depth is a much bigger problem (generally) than color disparity.

Shutter glasses would be a better solution, but also a costlier one. There’s only a couple of shutter solutions for computer monitors at the moment, but it’s real easy (and scan rate independent) to tint one eye red and the other blue; that’s why it’s so prevalent.

[Mickey Shay]

Yeah. Biggest problem is disparity. The reason for that is that any little difference, even if it is one pixel, it creates a weird reflection effect that hurts the eyes.

And like said above, you have to render 2 independent eyes. No combined, or anaglyph.

Regarding the issue with the monitors: Keep in mind that a monitor with electronic shutter glasses doesn’t project the same image as a monitor that uses passive (polarized) glasses. The depth changes slightly, and some artifacting takes place at times. Shutter monitors aren’t bad, they’re good for depth, but it’s not the same as what you’ll see in cinemas/passive monitors. The only reason I’m saying this is because at my work we switched from Shutter monitors to passive glasses. And we have the big unreleased (made to order) monitors (passive) for reviewing.

[Anonymous]

Really important the information above.
I need to know something else, how is the file that you need to be projected, which file format and how do you join th to images. Is a simple blend or you need somthing special. I know how to make an anaglyph image but i dont understand how to mix for those glasses. Thanks for information.

[Anonymous]

You don’t. Those are PROJECTION techniques, that require a full left and right eye render.

[Author]

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