Tek wrote:

> That's an interesting trick, I never knew you could use a fisheye lens like
> that! I'm going to start using that in some of my scenes.


It gets used in nearly all of my scenes now. I never use the default or 
ultra_wide_angle cameras anymore. I dicovered the trick one day while 
trying to square an image and noticed parts of the black circle got 
clipped away.

> 
> BTW, I've modified your definition so it takes account of the image dimensions:

I usually use something like this for images with a 1.33/1 dimension ratio:

right x*.5*1.33 up y*.5

That tends to clip the black corners away right where they need to be 
clipped.

I'll try your modification to see how I like it.. thanks!

-Samuel Benge

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