PNG as a background?
As a fan of both tikz
and background
, here's a version showing four different opacities:
Code
\documentclass[parskip]{scrartcl}
\usepackage[margin=5mm,a6paper]{geometry}
\usepackage[angle=0,scale=20,opacity=1,color=black]{background}
\usepackage{lipsum}
\backgroundsetup{%
contents={%
\begin{tikzpicture}
\pgfmathsetmacro{\myopacity}{mod(\thepage-1,4)*0.25+0.25}
\node[opacity=\myopacity] {\includegraphics[scale=1]{avatar.png}};
\end{tikzpicture}
}
}
\begin{document}
\lipsum
\end{document}
Output
You just have to run pdflatex twice for the transparency to kick in for your original tex source. The package actually prints out a message to say that when you run it the first time.