Some days ago I found this software (released under a BSD license) for
scientific visualization and more.
It uses GDAL, so perhaps it could read GRASS data directly in addition
to VTK (used by Paraview).
I haven't got time to try it, but I'm posting it here in case someone
finds it helpful.
Best regards,
Steko
--
Stefano Costa
http://www.iosa.it Open Archaeology
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Jabber: steko@jabber.linux.it