Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Are you certain that your windows are facing the inside? Both light and glow only emit light on one side of the surface, so you have to make sure they're facing into your space.
Are you using a glow or light material on you windows? If windows are small and distant, sometimes the light material works better because it uses deterministic sampling.
What is your -ad setting? If you're using glow, increasing the -ad and decreasing the -lw can help find small windows.
| | 2 | No.2 Revision |
Are you certain that your windows are facing the inside? Both light and glow only emit light on one side of the surface, so you have to make sure they're facing into your space.space. You can invert your surfaces easily with xform like this:
xform -I window.rad > window_flipped.rad
Are you using a glow or light material on you windows? If windows are small and distant, sometimes the light material works better because it uses deterministic sampling.
What is your -ad setting? If you're using glow, increasing the -ad and decreasing the -lw can help find small windows.
