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I have to agree with your use of large spheres for more accurate modelling.

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You could try getting the actual terrain of the area in the form of a .DEM file from the USGS.  Then you could have landscape that corresponds to the actual place.  It looks good as it is though.

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Nice stonehenge

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The stone is a little *too* blue, but is a very nice texture nonetheless.  The
sky is very nice, and the rolling hills are very cool.  "Summer" connection is
very tenuous.

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Good hilly landscape, but the stonehenge is flat and unconvincing.
There are already DXF stonehenges out on the 'Net. Find and use one.

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Nice Original Scene, somemore background would be nice