The improved sky model data are not installed. The improved sun and sky model will not be used.
This error message appears in cases where the Corona improved sky model data have not been installed. Without these data, the improved sun and sky model cannot be used, and the legacy Hosek&Wilkie sky model will be used instead.
When installed correctly, the data can be found in C:\Program Files\Corona\prgSkyModel
The data are installed by default when using the Corona installer in automatic mode. The possible reasons why they may be missing include:
- Using the "Unpack" option in the Corona installer (in such case the data are unpacked into the user-defined folder rather than into the expected C:\Program Files\Corona\prgSkyModel folder)
- Removing them from the default installation folder (possibly by mistake)
Possible solutions:
- Run the Corona installer and reinstall Corona using the automatic mode
If the above solution does not seem to help:
- First, use the Unpack installation mode
See: How to install Corona Renderer manually using the "unpack files" option? - Then, move the folder \Corona\prgSkyModel from the custom location where it was unpacked to C:\Program Files\Corona\prgSkyModel