[Tex/LaTex] Setting transparency of background picture in Latex

Question

I am currently creating a short advertisement in Latex. I would like to include a pretty transparent background image for that.

Including the background image per se is not the problem, I have managed that one. However, when I try to change the transparency of it, nothing changes but I would like to have it almost entirely transparent.

This is my LaTex source:

\documentclass[10pt,a4paper]{article}

\usepackage{transparent}

\usepackage{background}

\usepackage{tikz}

\usetikzlibrary{calc}

\usepackage{pst-node,graphicx}

\definecolor{darkpowderblue}{rgb}{0.0, 0.2, 0.6}

\begin{document}

Advertisement title 

\tikz[overlay, remember picture] \draw [darkpowderblue, thick] 

([xshift=0.5cm,yshift=-0.5cm]current page.north west) rectangle 

([xshift=-0.5cm,yshift=0.5cm]current page.south east); %---making a coloured box 

around ad




\begin{tikzpicture}[remember picture, overlay]

\node[opacity=0.6,inner sep=0pt] at (current page.center)

{\transparent{0.9}\includegraphics[width=0.9\paperwidth,height=0.6\paperheight]

{Download}}; %--- Including the background picture

\end{tikzpicture}


Ad text bla bla bla

\end{document}

When I change opacity, nothing happens; when I change \transparent{}, nothing happens.

Does someone of you know why the transparency is not adjusted?

Thanks a lot for your help

Answer 1

Remove all blank lines. Please only add blank lines when you know what it is doing.

opacity only is enough. Adding transparent or background may cause conflicts (?).

Compilable code, with opacity=0.6:

\documentclass[10pt,a4paper]{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{graphicx}
\definecolor{darkpowderblue}{rgb}{0.0, 0.2, 0.6}
\usepackage{lipsum}
\begin{document}
\tikz[overlay, remember picture] \draw [darkpowderblue, thick] 
([xshift=0.5cm,yshift=-0.5cm]current page.north west) rectangle 
([xshift=-0.5cm,yshift=0.5cm]current page.south east); %---making a coloured box 
\begin{tikzpicture}[remember picture, overlay]
\node[opacity=0.6,inner sep=0pt] at (current page.center) {%
    \includegraphics[%
        width=0.9\paperwidth,%
        height=0.6\paperheight%
    ]{example-image-a}%
}; %--- Including the background picture
\end{tikzpicture}

\lipsum[1-5]
\end{document}