In article <3caeba7d$1@news.povray.org>,
 "Thorsten Froehlich" <tho### [at] trfde> wrote:

> It is not a bug in POV-Ray but in your scene.  The origin of the image is at
> the upper left of the box while the origin of the function is the center of
> the image.  Applying an image map instead of the function image will clarify
> the origin.

Wouldn't it be much less confusing for the users if the function used 
scene-space coordinates instead of image-space? Then a function image 
could be used as a direct drop-in replacement for a function.
Does this affect anything else? If I remember correctly, images from 
file formats with a different coordinate system (< 0, 0> at the lower 
left, for instance) are modified to be oriented properly, couldn't the 
same be done for function images?

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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