Currently, Vectorworks has a plugin to cove.tool that sends out areas to get a basic 2D model. Definitely ask your Vectorworks Representation about when they expect to have the 3d Export to cove.tool.

The best way to get your 3d model imported to cove.tool from Vectorworks is to export to Rhino. For the basic manual mode 2d Export plugin from Vectorworks, see this article.

Follow this link to see how to export to Rhino:

Vectorworks Support Center: Importing and Exporting in Rhino 3DM Format (3D only)

How to export geometry from Rhino to cove.tool:
Rhino/Grasshopper Plugin (v.4.0.0 and later) Workflow for 3D Mode, Daylight, and Energy

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