Sounds horribly suspicious to me.
What appears in the definition tab of the surface properties?
Do you work alone, or do others work with you?
Are the base/comparison surfaces still in your drawing?
wrote in message news:5830645@discussion.autodesk.com...
My project TIN Volume surfaces have suddenly transformed to regular TIN
surfaces. Even the icon that typically denotes a TIN volume surface (green
triangulation overlaying black & white triangulation) has turned into the
regular TIN surface icon. It is as though they have transformed...no
cut/fill/net statistics either.
The comparison surfaces still exist.
Any ideas?