[Tex/LaTex] subcolumns not working correctly in tikzposter

Question

I'm trying to arrange content of tikzposter using subcolumns:

% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[25pt, a0paper, portrait]{tikzposter}
\usepackage{blindtext}

\title{Ttitle}
\date{01.03.2017}
\author{Author}
\usepackage{todonotes}

% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\maketitle


% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{columns}

    \column{0.5}

    \block{Textbox 1}{
        \blinditemize[5]
    }

    \begin{subcolumns}

        \subcolumn{0.5}

        \block{Fig 1}{

            \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
            \end{tikzfigure}
        }

        \subcolumn{0.5}

        \block{Fig 2}{

            \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
            \end{tikzfigure}
        }

    \end{subcolumns}

    \column{0.5}

    \block{Textbox 2}{
        \blinditemize[10]
    }

\end{columns}


% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{columns}

    \column{0.25}
    \block{Fig 3}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 4}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 5}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 6}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }


\end{columns}

\end{document}

My problem is that the figures 3 onward are too high and overlay first two figures:

How can I force figures 3 onwards to appear correctly under the caption of figures 1 & 2?

Answer 1

Seems you can have \phantom \blocks. It's a bit of a hack, but if you add

\phantom{\block{}{\rule{0pt}{15cm}}}

at the end of the second column (after the \block with the \blinditemize[10]), you'll push the second columns environment down accordingly, thereby eliminating the overlap.

It might not hurt to post a bug report at https://bitbucket.org/surmann/tikzposter/issues about this, though there hasn't been any activity in the repository for a long time.

\documentclass[25pt, a0paper, portrait]{tikzposter}
\usepackage{blindtext}

\title{Ttitle}
\date{01.03.2017}
\author{Author}
\usepackage{todonotes}

% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\maketitle


% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{columns}

    \column{0.5}

    \block{Textbox 1}{
        \blinditemize[5]
    }

    \begin{subcolumns}

        \subcolumn{0.5}

        \block{Fig 1}{

            \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
            \end{tikzfigure}
        }

        \subcolumn{0.5}

        \block{Fig 2}{

            \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
            \end{tikzfigure}
        }

    \end{subcolumns}

    \column{0.5}

    \block{Textbox 2}{
        \blinditemize[10]
    }

    \phantom{\block{}{\rule{0pt}{15cm}}}

\end{columns}


% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{columns}

    \column{0.25}
    \block{Fig 3}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 4}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 5}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }

    \column{0.25}
    \block{Fig 6}{
        \begin{tikzfigure}[Fig]
                \centering \missingfigure[figheight=15cm]{}
        \end{tikzfigure}
    }


\end{columns}

\end{document}