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import solids;
import palette;
currentprojection=orthographic(20,0,3);
size(400,300,IgnoreAspect);
revolution r=revolution(graph(new triple(real x) {
return (x,0,sin(x)*exp(-x/2));},0,2pi,operator ..),axis=Z);
surface s=surface(r);
surface S=planeproject(shift(-Z)*unitsquare3)*s;
S.colors(palette(s.map(zpart),Rainbow()));
render render=render(compression=Low,merge=true);
draw(S,render);
draw(s,lightgray,render);
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