web.463a916db7cab9247a9334df0@news.povray.org...
>
> A) I would have thought the translate operation needed to be within the
> brackets for the image_map? (I am not unfamiliar with programming, just
> POV-Ray). As written it seems to translate the pigment as opposed to the
> image.

Yes transformations are applied to the pigment. Is it a problem?

>
> B) Won't the image fill the entire plane? Sometimes I want the image to be
> only a small part of the "transparency"

If you use the keyword "once", the image_map fills a <0,0,-infinite> to 
<1,1,infinite> square section  before transformations. what you see (what 
POVRay traces) is the intersection of the plane with this infinitely thick 
square.
If you don't use "once", the map is tiled edge to edge in both x and y 
directions

>
> But, thanks for the tips - I will try to use some of them and see what
> results I get.

That's the best way :-)

Marc

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