Modification of code to include falx cerebri appears reasonably successful based on simulations.
Non-smoothed data in movie looks potentially closer to being biologically realistic.

Falx code:

Lines 135-142
%FALX HERE!!!!! set of zeroes.
% add in falx cerebri here!!
front=meshgrid(48:49,68:100,0:60);
top=meshgrid(48:49,38:68,34:60);
back=meshgrid(48:49,0:38,0:60);
Dom(front) = 0;
Dom(top) = 0;
Dom(back) = 0;