draw shaded surface without gridlines



I noticed a problem with draw3d.  Is allows hidden background lines in 
GNUPlot to be visible.

I have attached a small gif file.



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From: "Mario Rodriguez" <biomates at telefonica.net>
Sent: Friday, November 20, 2009 2:39 PM
To: "Thomas Plehn" <tplehn at gmx.de>
Cc: <maxima at math.utexas.edu>
Subject: Re: [Maxima] draw shaded surface without gridlines

> El mi?, 18-11-2009 a las 15:34 +0100, Thomas Plehn escribi?:
>> Hello,
>>
>> I want to draw a shaded surface of a function from R^2 to R. 
>> Unfortunatelly
>> there are always these blue wireframe lines drawn over the surface. I 
>> have
>> found no option, to turn them off. Is there any possibility?
>
> See some examples made with package 'draw' here:
>
> http://www.telefonica.net/web2/biomates/maxima/gpdraw/func3d
>
> The option to play with is 'enhanced3d'
>
> -- 
> Mario
>
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> Maxima at math.utexas.edu
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> 
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