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I want to have a frame background image in beamer that has opacity. I am using the following code:

\documentclass[aspectratio=169]{beamer} \usepackage{graphicx} \usepackage{tikz} \begin{document} % Define the background image and its transparency \newcommand\BackgroundPic{ \begin{tikzpicture}[remember picture,overlay] \node[opacity=0.1, at=(current page.center)] { \includegraphics[width=\paperwidth, height=\paperheight]{vangoghwaves.tiff} }; \end{tikzpicture} } \begin{frame} \BackgroundPic \frametitle{Your Slide Title} Your content goes here. \end{frame} \end{document}

But the image opacity does not change. I have also tried:

\usebackgroundtemplate{% \tikz\node[opacity=0.3] {\includegraphics[height=\paperheight,width=\paperwidth]{vangoghwaves.tiff}};}

in the preamble and various others, but it simply remains stubbornly opaque.

Any suggestions welcome. I am using Texifier (which is up to date), and have also tried various different typesetting options to no avail.

Added a screenshot here:

enter image description here

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    Since when have LaTeX had support for tiff files? Does this even compile without error? Commented Aug 13, 2024 at 9:24
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    If I change your image to \includegraphics[width=\paperwidth, height=\paperheight]{example-image} then it works just fine, and the is a clear difference when you change the opacity. Commented Aug 13, 2024 at 9:25
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    Unrelated: you don't need \usepackage{graphicx}, beamer already loads it. Commented Aug 13, 2024 at 9:34
  • @daleif - thank you, but it still doesn't work for me. No error for the tiff file - but I also have it as a jpg and that still doesn't work. Commented Aug 13, 2024 at 9:52
  • 2
    Please specify which engine you use (pdflatex, xelatex, lualatex). Which reviewer are you using? Does it support opacity? Commented Aug 13, 2024 at 10:04

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