Today, I will show you how to fix a common Stereoscopic 3D issue - unwanted horizontal
parallax in ZERO sphere, found in some of the consumer level VR180 camera - for example,
Insta360 EVO is the most obvious one.
If you want to learn more about this issue and why you need to fix it, please refer to
my previous tutorial here.
In that tutorial, I teach you how to fix it with Mistika VR - which is not a free software.
Today I will teach you how to easily fix it for free, as long as you have Adobe Premiere
Pro CC version 13 and above.
Let's dive right in.
Hey, what's up everybody, it is your Boi Hugh here from CreatorUp.
I highly recommend you watch this tutorial first to under the issue from a practical
standpoint.
But beyond the issue, you, as the director, should have the creative freedom to control
how strong is the 3D parallax, and where you want your audiences to focus.
So this is beyond fixing.
It is actually a creative choice.
Let me try to explain this in more detail.
Take a look at this diagram from TORUS media lab - the company made CANVAS STK - a professional
software for 3D 360 and 3D 180 motion graphics in Adobe After Effects.
So starting for the center pivot point we have our cameras or lenses in a 1 body camera
system.
The distance between them is called interaxial distance.
Commonly also known as IPD.
Notice our camera is converged in on each other.
Again this is a simplified way to explain this.
Fisheyes lenes will have more complicated characteristics.
Where the camera intersect is where we will find our ZERO sphere.
Anything in front of the 0 sphere is called negative space and those are the elements
that seem like they are popping out of the screen.
More parallax or more 3D if the elements are closer to the center pivot point.
Behind out 0 sphere is our positive space and that is where the objects seem like they
are in the screen.
If you place objects exactly at the distance of the 0 sphere they should appear monoscopic
and that is because they are at the same place on screen in each their own cameras so they
overlap perfectly.
Or at least they should.
Our depth budget is anywhere in the 3D space where we can add an object without giving
the viewers uncomfortable experience - a.k.a. - no cross eyes.
In most of the VR360 and VR180 cameras, we don't really use the positive depth budget.
So all you have is the negative depth budget.
And the depth budget varies depending on your 0 sphere and your IPD distance, which will
be different depending on your VR180 camera.
So the goal of this tutorial is to shift the 0 sphere to make sure it looks alright to
you.
Now the theory is out of the way.
Let me show you how to adjust the 0 sphere distance within Adobe Premiere Pro CC.
Open up Premiere, drop in your problematic VR180 footage.
Here we have the example footage from the last tutorial, which is shot with the Insta360
EVO.
In the Effects panel, type in VR and search.
We will find all the immersive effects.
VR projection is what we need.
I highly recommend you save this into your often used folder if you do lots of VR editing.
Drag and drop VR projection onto your footage.
Now turn on Toggle VR Video Display.
Again, if you don't see it, hit the plus size and drag and drop it into your toolbar.
Now right click on the video preview windows, go to VR video, settings, under stereoscopic
view, we pick anaglyph.
So we can see 3D now.
Now, go to Effect Controls panel.
Under VR Projection, we have disparity adjustment.
You want micro adjustment.
The trick is to hold down Shift and Ctrl in a PC or Mac and move the number.
It will have 0.01 micro adjustment.
For Insta360 EVO, generally, 0.4 is the sweet spot.
But adjust it based on your shots.
Finally, please review this footage with your VR headset - like with Oculus Rift, Window
Mix Reality headset or HTC Vive connected using your Adobe Immersive Environment right
here.
The downside for this technique compared to my previous tutorial using Mistika VR, is
that it fills in the edges with transparency.
If you turn off the Toggle VR display button, you see a black bar.
But you usually won't see this in the headset.
By default, it will use a 2x2 kernel for filtering, so you won't see aliasing when shifting by
small amounts.
If you do see aliasing, you can try turning the filtering slider up, increasing the multisampling,
at the cost of performance.﻿ Again, view this in your VR headset.
That's it.
Thank you again for watching.
If you enjoy this kind of deep dive technical tutorials, don't forget to give me a like
and share this video on your social media.
I want to empower you as a creator, not only a quick fix solution, but also the theory
behind it.
Again, if you have not, check out my previous tutorial on this topic to understand this
in a more practical standpoint.
I also like you to comment below.
Ask me questions regarding stereoscopic 3D in VR360 and VR180.
There are lots of great information as well in the comment session.
So do check it out.
There are lots of smart people in our viewers and they are ready to jump in and help you.
This is a knowledge-driven community, more than just simple camera reviews.
So don't forget to subscribe and hit the bell to stay up-to-date on the latest tech in the
VR filmmaking world.
My next review is going to be big.
I will review all the VR180 camera available in the market and compared it with professional
VR360 cameras like the Insta360 Pro 2 - which can also do VR180.
So I will see you in the next video, which is going to be on VR headset.