Incident Radiation on mesh returns 0 kwh

I am trying to do incident radiation on 5 meshes but for some reason only one of the mesh has some radiation output. The other 4 returns little to 0 radiation. I don’t think this analysis is right because when I perform the analysis on the floor below the meshes, the radiation analysis returns a high number. Can someone help me figure out what’s going on here?

Btw for now i can’t upload the .gh file because i’m a new user

have you checked that the surface is facing upward? Try to select it in Rhino and use the command dir to see if that is the problem and, in the case of facing downward, flip it and run the simulation again!


Oh yes thank you so much for your help that has solved my problem :slight_smile:

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That looks like a fun project!