Compute surfaces of objects

Perhaps the very simple examples help. :slightly_smiling_face:

https://hofk.de/main/discourse.threejs/2017/BufferGeometry/BufferGeometry.html
https://hofk.de/main/discourse.threejs/2017/Indexed%20BufferGeometry/Indexed%20BufferGeometry.html

from
https://hofk.de/main/discourse.threejs/2017/index2017.html

or
https://hofk.de/main/discourse.threejs/2019/ColorStripeChanging2/ColorStripeChanging2.html

see