Grasshopper

algorithmic modeling for Rhino

Hi,
I have not been using Ladybug tools in a bit, and as such I may be a but rusty.

I have adapted Mostapha's example for Shadow Range analysis available on Hydra. and the image below is what I get. I am happy to have an indication of the number of hours that the open areas receive on a day (in this case, the 21st March, in line with BRE guidance for the UK).

Why is the workflow working for one surface only?

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Hi Andrea, 

I can't open the files as I'm still working on version 5. My first question would be are the surface normals for the surfaces all facing the same direction? 

regards

Nick

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