Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The only purpose for generating a sky without the sun source is to use as an illum pattern on a window or similar interface. It is physically impossible to get a sunny or intermediate sky without having a sun in it, so the ground glow value is simply kept consistent with what the physically realizable "indirect" daylight component. If you apply the generated function to an illum window, you then get the correct indirect contributions from the sky and the ground. The assumption is that you are calculating the solar direct contribution some other way, such as a separate run where you add the results together.
| | 2 | No.2 Revision |
The only purpose for generating a sky without the sun source is to use as an illum pattern on a window or similar interface. It is physically impossible to get a sunny or intermediate sky without having a sun in it, so the ground glow value is simply kept consistent with what the physically realizable "indirect" daylight component. If you apply the generated function to an illum window, you then get the correct indirect contributions from the sky and the ground. The assumption is that you are calculating the solar direct contribution some other way, such as a separate run where you add the results together.
