Hello Ramona,
you can try my macro SCR_DTMCleanup which is open source and part of a whole lot of other macros available as package under
https://github.com/RonnySchneider/SCR_Macros_Public
SCR_DTMCleanup
- !!! BETA version !!!
- maximum tolerance values are limited to 1m for now
- this macro runs through all the vertices of a surface, combines them if they fall within the set tolerance and builds a new surface
- can fix issues with the Rainfall macro
- on large surfaces, with lots of vertices it can take some time to finish – speed was drastically improved with 17/01/2022 update
- currently boundaries for holes need to be added manually again
black lines are the original triangulation, red the new one

on very small scales the new triangulation can look a bit off, but that is a visualization issue
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Ronny Schneider
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