Paving/tile design over 3d hilly terrain

nick that’s so appreciated thanks for helping the understanding !!

Many thanks

Hi Nick im following your process through its great. I have just one question as I am semi new to grasshopper. This area "rebuild surface with ‘100’ what does this part do ? what is the point of it in the entirety of the model? Can you perhaps briefly explain? thanks a lot

i attached a pic the red part.

Kindest regards luke

Hey again Nick. a second question. Does the base tile to cutting plane refer to any previous dato/geometry?

Where does it get its size from? is there an invisible link to the previous tile dimensions? Or is this a seperate part?

I send you pm