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On Tue, 4 May 1999 18:00:42 -0400, Mike Metheny <lon### [at] vt edu> wrote:
>Then I tried using a radial
>texture, which was looking fine, except that it seemed there was a double
>image, still front facing, of the logo on the *inside* of the bottle (since
>the bottle is hollow and glass this is showing up) right behind the original
>logo, looking like a shadowed effect.
Yep, you're right, you'll get that double image both with radial and with
map_type 2. What you can do about it is use the wood or cylindrical patterns
in a pigment map to control where the image map appears as a function of
radius.
If you have a bottle whose radius is ro and whose inner radius is ri, for
example, and if it's aligned with the Y axis and centered on the origin,
you would do this:
pigment {
cylindrical pigment_map {
[(ro+ri)/2/ro image_map {...}]
[(ro+ri)/2/ro color rgbt 1]
}
scale <ro,1,ro>
}
Of course, if your bottle is curved significantly (e.g. has a narrow
'waist') in the area where the label will be applied, this will not
work and you'll have to fall back on the 'decal' approach.
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