Question: plot3d a surface

Hi All,

I would like to plot3d a function say z=f(x,y). x=0..1, y=0..1.

But I only want to display a surface of the plots, say z=0.1. Is there any simple function to do that?

I am looking for soemthing like: plot3d(f(x,y)=0.1, x=0..1,y=0..1)

thanks.

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