Fun with Cycles
9 months ago
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6. Fun with Cycles
9 months ago
This is an exploratory Cycles demo to show the fun features that I have been playing with. There are no flashy renders, just proof of concept stuff to show capability and current limitation. Hurray for Cycles!
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JikzCreator
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I tried to find out a bit more info about Lens radius, and while ignoring all the equations, this is what I gathered:
In a physical camera "lens" (with multiple lenses inside) you basically have two variables that control the Depth of Field: Aperture (or f/-value) and focal length (or just "f"). With an aperture of f/8 and a focal length of 50mm you have pretty wide DoF, while with the same aperture and a focal length of 300mm you have a more "narrow" DoF. (There's equations for that if you're interested)
But if you have just a single lens (aka "thin lens camera") you don't have a focal length per se (that you can change), instead you can change the radius of the lens to control the DoF (larger radius = narrower DoF and it's proportional to the focal length in normal lens). By using a lens with size n->Infinity you get a DoF that's d->0 (or "infinitive small").
I guess it's easier to calculate/simulate a single lens (or "thin lens camera") than a normal camera, but you "need" a way to translate values like focal length, aperture etc that's similar to a irl camera to values that work with a single lens model..
(I might be completely wrong, but that's how interpreted the papers I read, sorry if it's a bit confusing :?D )
There's also a small wikipedia article on thin lenses, but it only includes info about focal length/magnification, no info on DoF..
While on Wikipedia you can check out Circle of Confusion: en.wikipedia.org/wiki/Circle_of_confusion
You find a lot of content related to 3D and rendering when searching for this stuff (like this: books.google.se/books?id=5LfGGztCqOEC&lpg=PA68&ots=AapJtMR09U&pg=PA68 )
That's all I can find right now (found a bit more last time, but can't remember what I searched for exactly..)
Generous explanations but can I have the blend file please. I want to be sure about all options.
Thanks iin advance.
Please, normalize your sound in videos (if it's not a problem) :)
So exciting!
Thanks for the video, very cool tips on it!