How to get outline of multiple object

I want to get outline of multiple object to simplify the geometry. (below is the geometry image)
I tried face merge and region union, but it didnt work as I expected.
Does anyone know which component can help my problem?


you could try the “mesh edges” component, retrieving the naked edges. Will it help you? Probably not, because of the famous cad rule number 0815 : “garbage in(-put), garbage out(-put)”. :wink:

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It didn’t work well…
Thank you for your comment. Its good to know how this problem is recognized by others!