Select features of BREEZE 3DAnalyst are included in BREEZE AERMOD GIS Pro. The real power 3DAnalyst is through the use of three additional modules. Not everyone will need or desire the additional functionality provided by these modules, therefore, they are available as add-on's the base AERMOD GIS Pro application.
The BREEZE 3D Analyst User Guide can be accessed through the Help menu of the 3D Analyst application.
Page url: http://www.breeze-software.com/prod/aermod-isc/help/index.html?analyst.htm