As mentioned in the textbook "Introduction to Percolation Theory" (Chapter 4) by Stauffer et al., the variation of spanning cluster percolation probability $\Pi$ in a finite $L < \infty$ square lattice has the following nature:
Does anyone know any reference where similarly the variation of $\Pi$ is shown for different finite values of $L$?
Ideally something like Figure 3 of the paper linked by @Carlo but with $p$ instead of "seed mass" on the $x$-axis.
I ask because upon reading the linked paper, I'm not very convinced that $p$ is proportional to "seed mass". However, if someone could explain why exactly seed mass should be considered to be analogous to $p$, that would be an acceptable answer too.