% with pict2e and polar coordinate translation
\def\@fancy@qr@blobb{%
\@tempcnta=\z@
\roundjoin
\roundcap
\moveto(.5,.5)
\loop
\advance\@tempcnta by 30
\edef\rad{\fpeval{.1*\qr@modulesize+.13*\qr@modulesize*abs(rand())}}% fixed rand for both
\lineto(\fpeval{cos(\@tempcnta)*\rad+.5},\fpeval{sin(\@tempcnta)*\rad+.5})
\ifnum\@tempcnta<360\relax
\repeat
\fillpath
}%
% .
\newpattern0000{\@fancy@qr@blobb}%
% | | - -
\newpattern1000{\@fancy@qr@blobb}%
\newpattern0001{\@fancy@qr@blobb}%
\newpattern0100{\@fancy@qr@blobb}%
\newpattern0010{\@fancy@qr@blobb}%
% corners
\newpattern1100{\@fancy@qr@blobb}%
\newpattern1010{\@fancy@qr@blobb}%
\newpattern0101{\@fancy@qr@blobb}%
\newpattern0011{\@fancy@qr@blobb}%
% straights | --
\newpattern1001{\@fancy@qr@blobb}%
\newpattern0110{\@fancy@qr@blobb}%
% enclosed
\newpattern1111{\@fancy@qr@blobb}%
% t's
\newpattern0111{\@fancy@qr@blobb}%
\newpattern1011{\@fancy@qr@blobb}%
\newpattern1101{\@fancy@qr@blobb}%
\newpattern1110{\@fancy@qr@blobb}%

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