Preparing Model from Rhino & SketchUp

Model Preparation Guidelines

General Requirements

Keep the model simple—only include elements affecting light.

Use single, non-overlapping surfaces.

Ensure rooms are enclosed. If the model has open spaces, place it inside a "glass box". When the model is imported into Velux you can see the Visible Light Transmission (VT) to 100%, allowing all light to go through the glass. 

Label each surface by type and orientation—you will not be able to assign materials in Velux or adjust ones already assigned. Clearly define materials within SketchUp or Rhino.

Example labels include: North Wall, North Window, East Metal Wall, South Clerestory Window

Show wall thickness around windows instead of using thick walls.

SketchUp-Specific Instructions

Create a basic 3D model.

Assign distinct material names for each surface type (even if the material doesn’t match its final properties in Velux).

Verify the building’s orientation—SketchUp's solid green axis represents north.

Ensure only one layer of glazing to prevent incorrect light calculations.

Save the file as SketchUp 8 (.skp) for Velux compatibility.

Exporting: Go to File > Export > 3D Model, select SketchUp Version 8, and save the file.

Last updated by Abigail Green - March 2025

Based on tutorial by Pat Smith, with contributions from Madaline Portway, Logan Stein, Mary Guzowski, and Beau Gaulin.