On 6/28/07, Dawid Weiss <
dawid.weiss@...> wrote:
>
> Hi everyone.
>
> I just wanted to ask if anybody tried to do what I've been just trying to
> achieve. When you use certain styles in beamer, the boxes have a "shadow". This
> shadow is a gradient between gray and the background color (if I recall right),
> so it does not display correctly when placed over, say, an image.
>
> I've been thinking if it's at all possible to have a fully semi-transparent
> shadows that would actually work over images etc. This seems to be a problem
> reaching all the way to PDF specification since, according to what I've read,
> the gradients cannot be combined with transparency (there are no gradients on
> the 'alpha' layer... don't know if I'm clear). Anyway, I came up with some sort
> of a solution -- attached. If anybody did (or can) come up with a nicer
> implementation, it'd be great to share this knowledge. Thanks!
>
> Dawid
>
That was a cool example! Well done!
One idea that comes to mind is to use a transparent PNG with a
gradient fill as a shadow. I used a similar idea in an example in the
PGF and TikZ examples gallery:
http://www.fauskes.net/pgftikzexamples/transparent-png-overlay/I'm not sure if it will give as good results as your approach though.
Kjell Magne
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