I tried to calculate for situation1 the sunlight hours but the results will still be same as in situation 0 (even the obstruction in situation 1 is much higher, So I would expect lower values). What is going wrong?

I would like to substract the values of the grid in situation 0 from the the values of the grid in situation 1. So then I can compare what the effect is of the obstruction. How can I get the results on the yellow selected position (Breps with layername “SR_grid_compare_results”)?

I would like to substract the values of the grid in situation 0 from the the values of the grid in situation 1. So then I can compare what the effect is of the obstruction. How can I get the results on the yellow selected position (Breps with layername “SR_grid_compare_results”)?

See attached.
There was a need to set equal conditions for both cases 1 and 2. The first has 7 analysis surfaces (3 of them repeated) and the second 4. But not only the amount of geometries is important but also their order. See red arrows.

The difference calculation and show was very simple to do, just copying the definitions of one of the cases … you’ll get it when you see that in the file.
-A. solaraccess_compare_grid_updated_AY.gh (467.4 KB)