Thank you Ralph.
API is the next step for me. Anyway what I need I guess it is not possible using GDL. I thought I can define 2 surfaces as gsm objects and manage them via MVO, but will not work if those surfaces will be applied n Walls/Roofs, etc, ArchiCad elements.
Will not work because Surfaces are attributes, and I think my code will not run, if I change a parameter, using MVO.
I guess what I need is something like a penSet for Surfaces, if make sense.
Let's say "Surface Set" In this way I can have different scenes, for the same model. I can have one wall, and the surface on that wall will change, based on Surface Set settings, from a particular 3D view.
Hope to make sense.
Regards,
Daniel
Sincerely,
Daniel