Any interesting GH model is worth doing three or four times, right? 
Significant changes in this version:
- Disabled the purple group at the bottom using Occlusion (Occ) to generate the grid of white points.
- Projected the 30 center points to World XY which aligns the blue cross-sections at ground level.
- Added a second copy of Mesh Shadow (MShadow) using the 30 World XY planes to show shadows on the ground (cyan color surfaces).
- Used Region Union (RUnion) to join shadows together when possible.
I also deleted the unused Ladybug components from this copy to make it smaller.
sun_path_2020Jan19c.gh (51.6 KB)
P.S. MShadow, RUnion and Boundary have significant profiler burdens (times two, adds up to 1.6 seconds!) so added a Data Dam (red group) for a two second delay.
sun_path_2020Jan19d.gh (47.9 KB)