Can I/do I need to specify the transmissivity for my glass in SketchUp?

The Sefaira Plugin will consider any SketchUp surface with an opacity of less than 100% to be a window or skylight, depending on its position. To check how Sefaira has interpreted your SketchUp model, activate the Entity Palette and click "Show Entity Types".

Note: It is possible in SketchUp to define opacity (or transparency) differently for two sides of a single surface. Only the transparency on the outside-facing surface is important for a correct interpretation by Sefaira.

For information regarding the specific properties of glazing applied in daylighting analysis (including transmissive specularity), see this article.

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