Change uv while maintaining the external form

[Joseph_Oster]

Sorry, I “spoke” without looking at any code:

PolygonSrf-wave_2025Jun2a.gh (14.6 KB)

@坂本1

But I would like to outer frame to deform so that Z=0.

Ah, did I miss that in your first post? No, it looks like adding to the “spec” after the work is done.

Sorry, but once again I’m going to refer you to previous work: (in no particular order)

How to build a surface like this bump-shape child playground; and sort and re-order points to form a surface?

[BumpyPlayground_2019Aug5a] BumpyPlayground_2019Aug5a.gh (18.1 KB)

Smooth ripple surface from edge to attractor

[interference_Facade_2018Feb6a] interference_Facade_2018Feb6a.gh (17.6 KB)

Creating wave surface in grasshopper

Like this? [image] [WavySurface_2021Feb9a] WavySurface_2021Feb9a.gh (26.6 KB) Or if you prefer the wavy surface to go below and above the base surface (yellow group): [WavySurface_2021Feb9b] WavySurface_2021Feb9b.gh (28.0 KB)

Undulating surface keeping edges straight

Fillet the perimeter curve and ignore points outside of it? [undulating_surface_2020Feb25b] undulating_surface_2020Feb25b.gh (23.7 KB)

Surface smoother near windows

It looks to me like you are too late in the process to flatten the ripples near the windows because you have no way of recreating the rippled surface from the modified fragments, even if they were modified correctly (which it appears they are not). I would do it something like this: [WavySurface_2021Feb14a] WavySurface_2021Feb14a.gh (121.2 KB) Adapted from this:

Creating wave surface in grasshopper

Like this? [image] [WavySurface_2021Feb9a] WavySurface_2021Feb9a.gh (26.6 KB) Or if you prefer the wavy surface to go below and above the base surface (yellow group): [WavySurface_2021Feb9b] WavySurface_2021Feb9b.gh (28.0 KB)

etc.