mathscr with tikzposter?

Question

I like to load mathrsfs in order to access supplementary letter shapes: the ones provided by mathscr are noticeably different than the ones produced by mathcal. But it doesn’t work well with tikzposter: the following document produces the warning “Font shape 'U/rsfs/m/n' in size <29.86> not available size <24.88> substituted on input line 9”, and indeed the mathscr letter appears too small.

\documentclass{tikzposter}
\usepackage{mathrsfs}

\begin{document}
\begin{columns}
    \column{0.4}
        \block{Test}{
            $\mathcal{A}$ $\mathscr{A}$ $A$
        }
\end{columns}
\end{document}

Any idea if this problem can be solved or if a replacement for mathrsfs exists for this use case? (And, mathrsfs do not provide a bold version of these letters; it would be a plus if the proposed solution also avoids this problem.)

Answer 1

The package rsfso provides scalable Type 1 version of RSFS fonts.

This seems to give a good result:

\documentclass{tikzposter}
\usepackage[scr]{rsfso}

\begin{document}
\begin{columns}
    \column{0.4}
        \block{Test}{
            $\mathcal{A}$ $\mathscr{A}$ $A$
        }
\end{columns}
\end{document}

@MarianG in a comment below shows how to use \pmb to fake bold math