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  • Low Tide

on 21 Oct 2021
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N=300;
H=randn(N);
y=1:N;
for n=1:99
d=gradient(H);
g=d+1;
L=9-9*d;
m=mod(round(y+randn(N)*9)-1,N)+1;
o=mod(round(y'+L)-1,N)+1;
H=conv2(H-g/2+accumarray([o(:),m(:)],g(:)/2,[N,N]),ones(3)/9,'same');
end
surf(H/4-1,EdgeA=0);
patch([0,N,N,0],[N,N,0,0],[8,8,9]/9,EdgeA=0,FaceA=.7)
axis equal
camzoom(5)
light
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