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diff --git a/Master/texmf-dist/doc/asymptote/examples/smoothelevation.asy b/Master/texmf-dist/doc/asymptote/examples/smoothelevation.asy
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+import graph3;
+import grid3;
+import palette;
+
+currentlight=Viewport;
+
+if(settings.render <= 0) settings.prc=false;
+
+currentprojection=orthographic(1,2,13);
+
+size(400,300,IgnoreAspect);
+
+real f(pair z) {return cos(2*pi*z.x)*sin(2*pi*z.y);}
+
+surface s=surface(f,(-1/2,-1/2),(1/2,1/2),20,Spline);
+s.colors(palette(s.map(zpart),Rainbow()));
+
+draw(s);
+
+scale(true);
+
+xaxis3(Label("$x$",0.5),Bounds,InTicks);
+yaxis3(Label("$y$",0.5),Bounds,InTicks);
+zaxis3(Label("$z$",0.5),Bounds,InTicks(beginlabel=false));
+
+grid3(XYZgrid);