Unwanted mesh overlapping with surface

I have saved the following file with three 81-by-49 sized arrays of the class double:

[LINK REMOVED]

I want to use this data with the surf function as follows:

surf(X,Y,Z)

This worked fine in the past (just a simple surface), but now there seems to be an overlapping mesh:

This only happens when I use my PC, not others. Could it be my graphics card?

Answer 1

[Matt Fig]

set(gcf,'renderer','zbuffer') % Or painters

This is yet another opengl problem...