Thanks for the tips kyle.

The transparency work perfectly.   I ended up not doing the wrapping but was
still able to get the results I was after.  The "final" product is
available for all to see here:  www.zigaero.com

I still don't understand why the image is reflected on the "back side" of
the cylinder.  But thanks for the help!

-David

Kyle <hob### [at] gatenet> wrote:
> On Mon, 25 Jul 2005 17:03:09 EDT, "David" <nomail@nomail> wrote:
>
> >1) For the life of me, I can't get a PNG into POV that has a transparent
> >background.  I want the logo to be over the top of a (POV) textured
> >cylinder.  What settings should i use to get a Transparent PNG (or GIF, or
> >?).
>
> In GIMP, select Layer -> Transparency -> Add Alpha Channel to add an
> alpha channel to your png image.  Then select the background area and
> hit Ctrl + K.  This will erase the area and you should see a
> checkerboard pattern where the transparent area will be.  POV-Ray will
> recognize this and make the area transparent as well.  See section
> 3.5.1.5.3 in POV-Ray help.
>
> >
> >2) The image that is mapped to the cylinder "reflects" onto the far side of
> >the cylinder. This creates problems when i try to scale the image to the
> >approprate size, as the two images (primary and reflection) smear each
> >other.  How do I make it not reflect?
> >
>
> You need to use a cylindrical warp to wrap the pattern around the
> cylinder.  See section 3.5.12.6.5 in POV-Ray help.  I have attached a
> zip file that should help demonstrate all of this.
>
> Hope this helps!
>
>
> Kyle

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