% Adjust the relative magnitude of the Gaussians
g7 = g6+g3*3000;

img = surf(x3,x4,g7,'EdgeColor','none')
%colormap(gray);
%view(0,-90)
view(0,30)
%rotate(img,[0,90],90)
%viewmtx(0,90,60)
%axis off
%axis equal
axis square
%axis equal
axis vis3d
%axis image
axis fill