/usr/share/k3d/lsystem/lobster-form3.ls is in k3d-data 0.8.0.3-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
10
10
80
[c|H]C[ccc>>>>>>>>>[GcL]]
C=FR-C
R=[cc^^^^^^^^^BL][cc&&&&&&&&&BL]
B=F!<+F<+;'[&&&L]B
G=F!^+F^+;'[&&&L]G
L=[cc{--z++z++z--|--z++z++z}]
H=[^^^G]%[^^^G]>>>H
@
|