* **multiphase:** Empty grid states if no light paths are found ([37ee98f](https://github.com/ladybug-tools/honeybee-radiance/commit/37ee98f40b3396acd8c5126fef5ecb8452600b7f))
* **config:** Add a check for radiance environment variables ([56eafb2](https://github.com/ladybug-tools/honeybee-radiance/commit/56eafb24e9cd95b664e85ddbcfee8c59bd751066))