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|   This would be much more elegant than sacrificing 1/256th of your
| color range.
|
	And anyway povray already supports using the alpha channel of PNG and
TGA images for that: check the +UA option (never used it but it's there)

		Jerome
- --
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*      Jerome M. Berger      *
* mailto:jbe### [at] ifrancecom *
*  http://jeberger.free.fr/  *
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