Perfect Alignment:

I used the angle keyword in the camera, I rendered the base picture (640 by
480) with angle set to 67 (it looked the same as the default if angle is not
specified) then I rendered a 160 by 120 (to keep aspect ratio correct)
picture with angle set to 18.945 (calculated with a little trig). The result
was a perfect match. Now I am running the 150 frame series to overlay the
animation over the base picture.

Thanks for the help, it got me thinking in the right direction.

Kirk

"Kirk Hubbell" <kir### [at] yahoocom> wrote in message
news:3aaaadbc@news.povray.org...
> I am trying to create an animation of say 100 by 100 pixels that I can
> overlay on a 640 by 480 picture.I first render the 640 by 480 picture as
the
> base picture (in another program) now I want to create an animation of a
> part of the picture moving so I can overlay it, but I do not want an
> animation of the entire 640 by 480 picture just a 100 by 100 piece of it.
>
> By using the various settings in POVRay, I can make this animation with
most
> of the 640 by 480 output black and the part that I am interested in as a
> subset of the whole but I cannot figure out how to output just the part I
am
> interested in so that it will align exactly with the base 640 by 480
> picture. I would want a 100 by 100 output that matches up exactly to a 100
> by 100 part of the original 640 by 480.
>
> I have used the +H100 +W100 settings with the start and end row and column
> with no luck. Any ideas?
>
> Thanks,
>
>

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