How can I make a two-eye-view effect using two cameras?

Question

I have two cameras. The second was made by duplicating the first. Then I changed both cameras' viewport rects:

• First Camera X = 0 Y = 0.25 W = 0.5 H = 0.5
• Second Camera X = 0.5 Y = 0.25 W = 0.5 H = 0.5

Then I created two Post Process profiles for each camera, CC and CC1 in the Inspector.

The result:

But it seems to me a bit odd. Since the view through both eyes looks the same.

Shouldn't the right eye be rotated or something, so it's completing the view from the right side? That is, I don't want both cameras (eyes) see the same (right-hand) view.

Answer 1

You see, Cameras in Unity are designed to behave like a human eye:

As you can see from the image above, notional cameras have what's called a View Frustum; To put it simply, it simulates what the human eye would see in real life between a near and far plane (you can always read more here).

Now let's see how I would solve this:

First of all create a Canvas:

• Go to the hierarchy window, Create -> UI -> Canvas and set UI Scale Mode to Scale With Screen Size;
• Create an Image object as a child of the newly created Canvas by going (right-click on Canvas) UI -> Image;
• Stretch the image to cover the size of the canvas ( remember to hold down alt in order to do so) :

Now that you have done that, you could have a "mask" image like these ones for instance (yes, they are both 4k res and you can use them however you want :D):

Remember that when making a mask, the white portion of the image should have an alpha of 0.

• Now that we also have a mask, we can just apply that to the Image we created (when importing the image, remember to set Texture Type to Sprite (2D and UI):

And that's it! To improve even more the effect, you could try making the "lenses" with a gradient, adding multiple layers of textures with different drawing orders to create dirt, or waterdrops, animate the mask to act as an helmet that is being put on / took off ecc..

You can really go crazy with post processing effects too; have fun! :D