Am Montag, 17. Juni 2024, 23:50:16 MESZ schrieb Hans Hagen:
> On 6/17/2024 5:07 PM, Gerion Entrup wrote:
> > Hi,
> > 
> > I'm using LaTeX-Beamer and TikZ for figure typesetting.
> > With this combination, it is easy to combine Beamer's animation system with TikZ transparency feature.
> > This way, the resulting PDFs contain the full graphic on every page, but parts of it are invisible for a specific page.
> > One of these files is attached as an example.
> > 
> > The problem is to embed these PDFs into a ConTeXt document.
> > For example, this MWE seems to not respect transparency (see mwe.pdf):
> > ```
> > \starttext
> > \externalfigure[fig.pdf][page=1]
> > \stoptext
> > ```
> > 
> > I use Okular/Poppler as PDF viewer.
> > Can I fix this somehow or is it a bug somewhere deeper?
> next time check the file that you include ... it has no transparency (it 
> has zero values)

I don't really have a clue about the PDF standard. It is made with the TikZ opacity flag therefore I thought it controls the transparency.
See the attached tex file to reproduce fig.pdf (compilation with `latexmk -pdflua fig.tex`).

I also found a workaround. It is possible to import fig.pdf with Inkscape and export just the correct page as PDF again and embed that in ConTeXt:
```
inkscape --export-page=1 fig.pdf --export-type=pdf --export-filename=1.pdf
```

Gerion