Stands at a chosen point in your model and measures how much of the sky dome is visible (sky view factor), plus how many hours per year that point sees direct sun. Core daylighting and outdoor comfort metric.
Sky Mask Analysis
Runs in the browser — nothing to install.
| Input | .3dm + point |
| Output | SVF · Shadow autonomy |
| Sky models | CIE / Uniform / Clear |
Using it
Upload your model
A .3dm with the building and any context (walls, trees, neighbours).
Load weather data
An EPW gives you real annual sunlight hours.
Pick an analysis point
Double-click in the 3D view or type X/Y/Z coordinates.
Choose a sky model
CIE Overcast for worst-case daylight; Clear for sunshine analysis.
Set density
Higher = more accurate, slower.
Read the metrics
Diffuse visibility, geometric SVF, shadow autonomy, sunlight hours.
Tips
- Do — Use Overcast for daylight code compliance; use Clear for solar access studies.
- Avoid — Tiny density values on first run — start at the default and refine.
Sky Mask Analysis
Runs in the browser — nothing to install.