% reversibleXOR.tiles
% {x y x+y y}
% This tileset is reversible -- it can grow (heal?) in any direction.
% The input border is random, so we can see the informational structure.
% Perhaps more interesting reversible tile sets could be investigated.
tile edges matches {{N E S W}*}
num tile types=9
num binding types=3
tile edges={
{1 0 0 1}[.1]   % Corner
{1 0 1 2}[.1]   % Bright (vertical)
{1 0 1 3}[.4]   % Bright (vertical)
{2 1 0 1}[.1]   % Bleft  (horizontal)
{3 1 0 1}[.4]   % Bleft  (horizontal)
{3 3 3 3}       
{3 2 2 2}       
{2 3 2 3}       
{2 2 3 2}}      
binding strengths=
{2 1 1}