Network Analyst layers do not draw correctly in ArcScene

Description

The default marker symbols used by Network Analyst layers do not draw correctly within ArcScene. Some types of network locations, such as stops, do not draw while others, such as barriers, draw incorrectly scaled.

Cause

ArcScene only supports a subset of symbols available in ArcGIS. The default symbols used by Network Analyst are not supported.

Workaround

1. Right-click on the sublayer that is not drawing correctly and click Properties.
2. Click on the Symbology tab
3. Click on "Features" in the Show list and select "Single Symbol"
4. If you want, change to a different symbol that ArcScene supports