My 1st stereoscopic image gone wrong - please help

[PIXELBOX_SRO]

Hi guys,

This is my first try to create a stereoscopic image, but for some reason it doesnt seem to work correctly.
I ve followed chaostv tutorial on youtube and ive composited the anaglyph just the way it should be.
The depth illusion seems fine but i am getting doubled image.



Can you please help?
I dont really know what went wrong as i ve done everyting according to tuts.

Thanks a lot for any reply.

Best Regards

[Morne]

nothing is wrong, you're suppose to get a double image, BUT you're suppose to view the image with your red/blue glasses. Looks fine with my glasses.

With the red/blue glasses one eye sees the one "double image" and the other eye sees the other image. This creates your "3D depth"

If you view it without the glasses, yes well then you will see both images at the same time with both eyes which makes it look double and wrong.

[PIXELBOX_SRO]

but i see it through glasses red/blue

but it looks still doubled

[PIXELBOX_SRO]

everyone here in office sees it doubled through glasses...
i dont know if you get me...

i can see some semitransparent doubled objects there.
for example the table...i can see it as a ghostly apparition on both sides of its position

[LarsSonparsson]

Isn't that red/cyan stereo image? So red/blue glasses doesnt work then.

[LarsSonparsson]

Also the divergence is really large. Red and cyan colors are really far away from each other. That makes it really hard to read that picture.

[PIXELBOX_SRO]

thanks for reply Lasse,
how should i chenge the divergence?
is it derived frm the camera focus distance???
or from the eye distance parameter in the vraystereoscopic helper...

as far as my glasses....i ve ordered red/blue but they look more like red/cyan thats why i went for this sort of anaglyph comp :-/

[LarsSonparsson]

I dont use vraystereoscopic helper, but it seems to have "eye distance". Decreasing that will do the trick.
You should also take care of focus distance. Everything closer than cameras focus distance will look like coming out from the screen.
Normally in stereo, you should try to put almost everything behind the focus point.

[PIXELBOX_SRO]

i get you....
this means the focus point should be quite short in the interior environment if i get you right.
i use the standard 6.5cm eye distance....what distance do you use?

will have to do some internet research on the proper stereoscopic math....there are more things to take into account when working with focus point such as DOF etc
any hints on a good source?

[LarsSonparsson]

There is no right distance. It should be always about 6 cm, but in some scenes that's just too much.

You should check these tutorial videos. You can download stereocamera script from there too. It has some advanced features that will guide your camera setup.

http://area.autodesk.com/blogs/louis...eocam_modifier

[Da_elf]

somehow i dont seem to see where the focal point is supposed to be

[LarsSonparsson]

What do you mean? You don't see the focal point or you don't understand where it should be when rendering to stereo?

[Da_elf]

shouldnt there be a point where the red and cyan parts converge together ?
on the table legs the cyan is to the left and red is on the right on the door frame the same but on the plant in the hall it is slightly reversed which puts that point of convergence somewhere in the hallway

[LarsSonparsson]

Just two images showing how focus point and safe areas works.

This is how vray stereohelper looks. It's really critical to find the right focus point for stereo renders. Usually I try to but everything behind it. It's a safe way to go and can still give you great depth.
(example in Avatar, they had only few shots with elements coming out of the screen).

Second image is Viewport grap from stereo modifier script. It draws those "safety" areas to your camera. That helps alot when playing with camera position, focus point, eye distance etc.

[LarsSonparsson]

shouldnt there be a point where the red and cyan parts converge together ?
on the table legs the cyan is to the left and red is on the right on the door frame the same but on the plant in the hall it is slightly reversed which puts that point of convergence somewhere in the hallway

Ah, yes, you are right. It really looks like the focus is somewhere in the back wall.