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Jeep35 | 9 years ago | 10 comments | 1.8K views

I'm trying to render 3D animations to be displayed on a 3D TV.
Until now I used these parameters :
Aspetc ratio 2:1
Pupil distance on the camera layer : 1
They were perfect but I had never used an image in these animations.
I've just finished an animation containing an image layer but this image is rendered stretched. If I give a size of 2 at its width it becomes correct.
Am I right in doing this ?

yes, but the aspect ratio setting has changed, you do not have to change the image width.

Now it is 1:2 / when you do this the DAR will then turn to 8:9 which is what you want.

outerspace-software.com...

komies, 9 years ago

Komies in another article, you set aspect ratio to 2:1 in order your project works fine which seems to be the correct way of making a 3D output.

But .... did you ever try to do the same with an image layer in your project ? I'm turning the things in all the possible manners and the only way of having the image at its correct width is to give it a double width. If this this the normal way of doing, I say OK, I'll do like that.

Jeep35, 9 years ago

In Blufftitler V.12 the Pixel aspect ratio is now coupled with the Display aspect ratio did change the setting 2:1 to 1:2 for SBS 3D. Blufftitler is evolving and so should you :)

You don't want to make your image double as width to compensate.
Why, because if you rotate it on it's z axis 90 degrees it would distort the image, it becomes 4 times as long.

Just set the PAR to 1:2 and you can convert any show with or without images to SBS 3d without distortion or to manually set the width of every layer to double.

Try it with a complete show, set camera / pupil distance to 2.5 / set PAR to 1:2 and export video.

komies, 9 years ago

OK thank you Komies, it's working fine, but this has changed because in older versions we had to be in 2:1 ratio

Jeep35, 9 years ago

Komies, I've just made a new try and it's not OK. You will find in the zip file :
- the scene in normal ratio 1920x1080 1:1 16:9 (3d-normal-ratio.jpg)
- the scene when ratio is 1:2 8:9 (3d-ratio1-2.jpg) the scene has moved to the left
- the scene when pupil distance is validated at 1 (3d-ratio1-2-pupil1.jpg)
When exported as film I get the scene as viewed in BT (scene moved)

jeeep.breizhbleu.com...

Jeep35, 9 years ago

Finally, several tries told me that the ideal way for these outputs was to remain in ratio 1:1 and just play with the pupil distance. The images are not stretched or moved, that's perfect !

Jeep35, 9 years ago

You are right, It works with 1:1 now.
but 1:2 works also if you play fullscreen or export it as video.

PAR 1:1 is Full SBS 3d
google.nl...

PAR 1:2 is Half SBS 3d
google.nl...

Full SBS 3d has my preference (higher resolution), thanks for this.

Still learning and evolving with Blufftitler.

komies, 9 years ago

In the current version the PAR (pixel aspect ratio) is doubled when using the PUPIL DISTANCE prop. This works great for HALF SBS.

However for FULL SBS the PAR should not be adjusted. I don't think there's a workaround to achieve this in the current version.

And next to the horizontal composition (SBS: side by side) we probably also need the vertical one (TAB: top and bottom).

So somewhere (show? general options?) the following 4 3D options should be added:
1) HALF SBS (double PAR)
2) FULL SBS
3) HALF TAB (half PAR)
4) FULL TAB