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Here's an interesting link that covers much of the ground in this topic.
http://www.uni-ak.ac.at/opengeom/dld/extreme.pdf

affected, I rendered a gridded floor in maya but any 3d program would do it. Then I rendered a 45 degree pass in 5 degree intervals. ie: 0 degrees 5 degrees etc. I did this once with the camera horizo ...

I'm curious. Can you explain to me what your preferred situation would be in, say, an art gallery full of paintings.
Many of the painters after about 1500 knew about the distortions caused be perpect ...

This material only applies if you are willing to rotate the camera.

Aaaargh! Stop there. What do you look with? Cameras, Movie cameras, Virtual computer cameras? No you look with eyes. Narrow fiel ...

Sorry I thought I'd made this clear I am talking about circles lying on the ground plane. By orientation I mean in that plane. As a general guide if you extend the minor axis to where it crosses the h ...

Yes it's a subject thats bound to get those braincells hopping about. I have just experimented with a spherical mapping of each image onto the sphere. With very unexpected (for me) results: the spheri ...

But if you would experience your image file in a sphere, being yourself in it�s center, it would look just fine.
No it wouldn't but this one would.
http://www.treeshark.com/images/Persp/Polkasph.jp ...

Perspective has as much influence over the circle in perspective as it does over anything else. I think you are confusing the center of the circle with the center of the ellipse that the circle become ...

Once you are talking about fields of view greater than 180 degrees you are talking about mappings from 3-space to 2-space other than that which the eye does.

But that is just what the eye/brain com ...

The horizon is always straight though I don't object to it curving for artistic purpose
the horizon is always on the nodal point of any veiwing device. Remember that the camera back virtual or other ...

Very good you have a nice light touch, These are acrylic? You might find it easier with proper watercolour they are more vibrant and flow better in thin washes.

Hi all, there are several sorts of panoramic perspectives. One is cylindrical this has 4 vanishing points. East South North West. Spherical has these and adds one up and one down. Until they invent sp ...