3D Analyst with tinShapeZ
Comparison of triangulation in the tinShapeZ shapefile format with 3D Analyst.

This is a 240,000 record polygonZ triangle shapefile created from 120,000 points by tinShapeZ. Notice the detail.

This is close up of the above file next to a 3D Analyst version of the same point set.

This is a view seen through the 'scene' viewer in 3D Analyst of both files.