Dashed border but custom shape

Question

I know that tcolorbox can have dashed border. However the stripes are rectangular. But is it possible to change the rectangles to parallelograms (45 angled) with inner and outer border as well, such as

Answer 1

You can try with a tcboxedraster which contains only one tcolorbox. The envolving box contains the pattern and the inner box covers part of it imitating the slanted dash.

The pattern definition was taken from using pattern inside tikz shapes with dropped shadows

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{lipsum}

\usetikzlibrary{patterns}

\makeatletter
\tikzset{% customization of pattern
         % based on <m.wibrow@gm...> - 2013-03-24 07:20: 
        hatch distance/.store in=\hatchdistance,
        hatch distance=5pt,
        hatch thickness/.store in=\hatchthickness,
        hatch thickness=5pt
        }
\pgfdeclarepatternformonly[\hatchdistance,\hatchthickness]{north east hatch}% name
    {\pgfqpoint{-1pt}{-1pt}}% below left
    {\pgfqpoint{\hatchdistance}{\hatchdistance}}% above right
    {\pgfpoint{\hatchdistance-1pt}{\hatchdistance-1pt}}%
    {
        \pgfsetcolor{\tikz@pattern@color}
        \pgfsetlinewidth{\hatchthickness}
        \pgfpathmoveto{\pgfqpoint{0pt}{0pt}}
        \pgfpathlineto{\pgfqpoint{\hatchdistance}{\hatchdistance}}
        \pgfusepath{stroke}
    }
\makeatother

\tikzset{
    Pattern/.style={
        pattern=north east hatch,
        pattern color=black,
        hatch distance=15pt, 
        hatch thickness=5pt
    }
}

\begin{document}
\begin{tcboxedraster}[%
    raster columns=1,
    colframe=black,
    colback=white,
    ]{
    enhanced,
    colframe=black, 
    colback=white,
    underlay={%
        \begin{tcbclipinterior}
            \fill[Pattern] (frame.north west) rectangle (frame.south east);
        \end{tcbclipinterior}
        }
    }
\begin{tcolorbox}
\lipsum[1]
\end{tcolorbox}
\end{tcboxedraster}
\end{document}