Please find here the (last) version of the scene. Search for the 
differences ;-)

One notable change I want to elaborate on a bit. I dumped Gilles Tran's 
MakeGrass and replaced it by Lawnmaker from Uwe Gleiss (2004). 
Unfortunately, his website from where it was downloaded does not exist 
anymore. Interestingly, the grass blades were made of parametric objects 
and I remembered the infinite time it took to render a proper scene, so 
I never used it. William Pokorny's discovery about the optimal settings 
for parametric objects, made me curious of course and, Lo! Lawnmaker 
suddenly became a serious candidate. Not stopping there, and interested 
as I am in using mesh2{} files, I decided to experiment with Meshmaker 
(thanks Ingo!). With the help of an example file by Friedrich 
Lohmueller, I made the conversion within a couple of minutes. Taking 
into account the size of the grasspatches and their grass blade density 
(which can increase parsing time quite rapidly) a typical lawn renders 
very fast, hardly slower than the rest of the scene.

-- 
Thomas

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