Digital-Tutors We perceive CA in 3D and our brain corrects it. It doesn't work the same in 2D because it occurs within the lens of our eyes, as the image already has CA our brain cannot correct for it. If it could do this then we wouldn't be able to see it on images, but we can see it. It may be useful for full-3D CG but not 2D. Unless I'm misunderstanding something.
Nuke the World Yes you are. We're used to looking at real footage. Real footage has chromatic aberration that effects (ever so slightly) the way we see film. The closer you can get 3D renders to look like footage the better.
Chris Wheeler It's not like CA can't be corrected with either a certain camera or software. Removing CA would make footage more realistic. In the real world humans don't perceive it at all. In films we're supposed to imagine we are physically there, not looking through a camera.
( ͡° ͜ʖ ͡°) You can definitely remove CA from footage. However in my line of work directors like keeping the scan as perfect as possible. That includes CA, or film grain/noise. We're expected to match our cg elements to the scan, so.. that's how it goes. Anyway i am very sure you have seen many CA shots in the cinema and you wouldn't even notice it. lol.
( ͡° ͜ʖ ͡°) Film is also an artform. CA can fall into the category of visual aesthetics that as artists we have the choice of making, such as lens flares or color grading. Our eyes don't perceive flares as you would on lens nor would you see the world with a green tint like in the Matrix. You don't like seeing CA, that's fine, don't use it in your own film. But no need to push your biases onto people who are just trying to learn and do their jobs. Anyways, great tutorial, thanks Digitaltutors.
![Compositing Complex Shadows in Nuke [Advanced]](http://i.ytimg.com/vi/Yb3Cn3JnkUI/mqdefault.jpg)
![Compositing Complex Shadows in Nuke [Advanced]](/img/tr.png)
You do realise the human brain automatically corrects for chromatic aberrations right? Why do people insist on using it?
Digital-Tutors We perceive CA in 3D and our brain corrects it. It doesn't work the same in 2D because it occurs within the lens of our eyes, as the image already has CA our brain cannot correct for it. If it could do this then we wouldn't be able to see it on images, but we can see it.
It may be useful for full-3D CG but not 2D.
Unless I'm misunderstanding something.
Nuke the World Yes you are.
We're used to looking at real footage. Real footage has chromatic aberration that effects (ever so slightly) the way we see film. The closer you can get 3D renders to look like footage the better.
Chris Wheeler It's not like CA can't be corrected with either a certain camera or software. Removing CA would make footage more realistic. In the real world humans don't perceive it at all.
In films we're supposed to imagine we are physically there, not looking through a camera.
( ͡° ͜ʖ ͡°) You can definitely remove CA from footage. However in my line of work directors like keeping the scan as perfect as possible. That includes CA, or film grain/noise. We're expected to match our cg elements to the scan, so.. that's how it goes. Anyway i am very sure you have seen many CA shots in the cinema and you wouldn't even notice it. lol.
( ͡° ͜ʖ ͡°) Film is also an artform. CA can fall into the category of visual aesthetics that as artists we have the choice of making, such as lens flares or color grading. Our eyes don't perceive flares as you would on lens nor would you see the world with a green tint like in the Matrix. You don't like seeing CA, that's fine, don't use it in your own film. But no need to push your biases onto people who are just trying to learn and do their jobs. Anyways, great tutorial, thanks Digitaltutors.