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diff --git a/Master/texmf-dist/doc/metapost/featpost/example/standard/hexagonaltrimesh.mp b/Master/texmf-dist/doc/metapost/featpost/example/standard/hexagonaltrimesh.mp
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+++ b/Master/texmf-dist/doc/metapost/featpost/example/standard/hexagonaltrimesh.mp
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+% hexagonaltrimesh.mp
+% L. Nobre G.
+% 2003
+
+%input featpost3Dplus2D;
+
+def zsurface( expr xc, yc ) =
+ cosd(xc*57)*cosd(yc*57)+4*mexp(-(xc**2+yc**2)*6.4)
+enddef;
+
+f := 7*(4,1,5);
+Spread := 35;
+LightSource := 10*(4,-3,4);
+SubColor := 0.4background;
+
+beginfig(1);
+ numeric np, ssize;
+ path chair;
+ np = 40;
+ ssize = 15;
+
+ hexagonaltrimesh( true,np,ssize,zsurface);
+endfig;
+
+end;