[Pipmak-Users] Re: panorama problem

[Christian W. <cwa...@gm...>]

>> I wonder if my camera setting (I use Maya 6.5, FOV=90 degrees)is 
>> wrong or is
>> there a specific camera setting for pipmak.
>
> Depending on what resolution you are rendering the images at, actually
> (according to Christian Walther) the FOV should be slightly different 
> (something
> with the pixels at the edges of the image...)
> ------------------
> |Image Res| FOV  |
> | 128*128 |90.449|
> | 256*256 |90.224|
> | 512*512 |90.112|
> |1024*1024|90.056|
> ------------------
>
> Don't ask me why, but it seems to work.

That's correct. The reason is explained in the manual in figures 3 and 
4 on page 7, but unfortunately the text about it hasn't been written 
yet. It's got to do with the fact that with bilinear interpolation, the 
pixel values give the color at the *center* of the pixel, and seamless 
interpolation across a cube edge is therefore easiest to achieve by 
scaling the image up a tiny bit such that the *centers* of the 
outermost pixels lie on the cube edge.

I guess it's high time that I do some work on the manual again - at 
least include that table.

Hope that helps

  Christian