[VR] 360 degree video vs. 3D spatial content

Nowadays, the mainstream is VR.

From Oracular acquired by Facebook, to Google's cardboard, to HTC's Vive.

I'm hearing VR news here and there. Not to mention Samsung's gear VR.

You know that you are developing games in VR even in reality reflection , do not you?

By the way, have you tried VR experience? Did you have such an experience like the movie Matrix?

As soon as I got into VR company and got a chance, I introduced Gear VR to my family and friends.

What I showed you was the new VR content from the New York Times.

https://youtu.be/FYP95WJmW3o

New York Times – Man on Spire. You can see 360 degrees by moving both sides with your mouse.

Everyone liked me very much. "Wow" this feeling?

With Gear VR, you can see 360-degree content based on the direction in which your head moves.

Those who have experienced most VRs would have enjoyed this 360 degree video for the first time.

By the way, one of my friends responded like this.

To what, what is this? This is just a 2D video, is not it? This is not the VR I thought!

Why did my friend feel this way? This article starts here.

When my friend recalled the VR experience, he imagined the content that created the 3D space

360-degree video was not a VR experience my friend thought.

So, what's different about 360-degree video content and 3D spatial content?

People who are new to VR often confuse 360-degree video content and 3D space content.

For someone, both of them have VR experience.

But they are completely different content, from the creation process to the use.

In this article, I'll show you how these two content are different and what are the pros and cons!

360 degree video content – VR like movie

In fact, from the perspective of producing content,

Both content start from a completely different starting point.

360-degree video is a 360-degree view of the camera.

I mean, it's like a panoramic picture.

In the case of 360-degree video,

I made a round sphere shape by connecting end and end.

Basically, you do not have any depth information, but you can see it as a paper ball that is made up of two dimensional images.

With a VR headset and 360-degree video content, you can see yourself as if you are in the camera's position. I mean, I'm going to go inside a round ball and see the content.

There's a 360-degree video projected on the wall of the Jimboloo camera.

That's why the user's location is fixed at the camera's location.

If the camera moved while creating the 360-degree video content, the content that the user sees moves along.

It's like watching a movie passively by the director, just like a movie.

The video is shot at 360 degrees so you can turn your head to see the ground below or the landscape behind you

The body is fixed at the position of the camera.

It's like it's on the back of the camera.

Think of watching the end and end of a panoramic picture.

The advantage of 360-degree video content is that high-quality

I can feel the immersive feeling of seeing.

You can also use the fact that your location is pinned to the camera,

Being able to show it in a limited way can be an advantage for storytellers.

https://youtu.be/m9pbCzUPmY8

Sports content using 360-degree video

Because there is no depth information, it is often the landscape,

Or use it for live broadcast content with many attractions.

Especially, the fort is a real-time sports broadcast, and I am using a lot of 360-degree video.

One of the advantages is that it is cheaper to produce than 3D spatial content.

Even if computing power is not high, you can enjoy the contents, so you can easily access it from mobile VR.

3D spatial content – game-like VR

3D space content is a little different.

3D spatial content is like a game or an animation

We start by placing 3D models in virtual 3D space.

The objects and the background inside are all made of 3D models.

If the 360-degree video was a 2D continuation, 3D spatial content

You can think of it as content with 3D objects placed in virtual space.

The biggest difference is that in 360-degree video content, the user's viewpoint was fixed to the camera

In 3D space content, you can change the point of view infinitely.

(Unless the VR headset trips over the line connected to the computer).

It's easy to think about 3D games. Fortune popular game, over-watch everyone know?

In overwatch, the point of view changes continuously depending on the direction and angle of the character moving.

In 3D space content, you can change the viewpoint according to the movement of the user.

https://youtu.be/Qo02MUkaIH4

Watching the Oasis map of Game Overwatch

If you have played the game, you can see that the background and point of the game change as you manipulate the character.

From the angle of the head to the walk, as we see in reality.

However, the 3D models that make up 3D space content contain a lot more information than the 360 degree video. 3D models basically consist of a skeleton that shows the structure and shape of an object and an image that is put on the skeleton. Because the skeleton is like clay that is made by joining faces, there is a lot of information that needs to be stored on one side.

It contains location information in three dimensions.

Even the images on the skeleton are often composed of several chapters rather than just one.

Create image maps such as color information, light reflection information, and material information, and put on multiple sheets

There are 3D models that are highly matched from various angles.

So, it takes a lot of time, money, and manpower to create content.

Overwatch character 'Diva' 3D model and image map example

3D model of diva = skeleton + image map
Image map of diva – (from left to right) Color information map, light reflection information map, material information map

The advantage of 3D spatial content is that it has depth information.

You can see the object from the front, from the back, and you can walk freely.

Because it is free, it is good to make a story as part of a quest to achieve a goal or purpose.

But 3D models are costly to create, and most content

It has the disadvantage of being able to experience only in PC VR because it requires high computing power and graphics.

To simplify the texture or skeleton to reduce data,

It is one of the disadvantages of being artificial rather than actual.

In many cases, 3D space contents with unique art concept are made using artificial feeling,

I can not say that it is a disadvantage.

I have some data that I can easily compare.

Source: http://www.videoedge.net/news/expertise/whats-difference-between-360-degree-video-and-virtual-reality/360121

Recently, high resolution image texture of 360 degree video contents,

And there is a way to satisfy both the depth of 3D spatial content.

One of them is how to capture the entire landscape like a 360 degree video using a Depth camera.

https://youtu.be/DFobWjSYst4

Out of CES 2017 – 3D spatial content created using depth cameras in real Vietnam

3D scans of people or objects in the in-house studio of reality reflection

How to make a 3D model can also place the actual object model in 3D space.

If these methods are developed and popularized, many real-life spaces can be reproduced in VR.

Now, is 360-degree video content different from 3D spatial content?

Do not forget that both content are immersive and engaging!

Please refer to this article when dividing contents in VR!

Even in reality reflection , the appeal of VR content
I'm worried about making game contents that can save as much as possible!

This article is written to share interesting topics about games, VR, Tech related to RR .
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