Bryan Heit wrote:
> But pixels in an HDTV image are not square (aspect ratio of 1)

Yes they are.*

> , so you
> need to tell povray to render non-square pixels.  I'm not sure if
> there is a more efficient way of doing this, but I always use the
> camera command for this.  You simply add the "right" command to the
> camera, with the desired aspect ratio after the "right command.  For
> HDTV this is 16:9;
>
> camera {
>   location <0,0,0>
>   look_at <0,0,1>
>   up y
>   right (16/9)
> }

This is the right thing to do, yes. But it doesn't create non-square pixels; 
on the contrary it creates square pixels because the set aspect ratio in the 
camera (16/9) matches the aspect ratio of the image (1280x720 or 1920x1080).

* According to Wikipedia, the pixel aspect ratio of native HD signals is a 
"square" 1.0, or 1 pixel length = 1 pixel width. New HD compression and 
recording formats such as HDV use rectangular pixels for more efficient 
compression and to open HDTV acquisition for the consumer market, but I 
think that's irrelevant with regard to rendering.

Rune
-- 
http://runevision.com

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