Does anyone know how to convert these elevations splines (imported DWG) to a polymesh?

[stevesideas]

Any help appreciated. Thanks.

[fixeighted]

Get them into Max and add a 'terrain' compound object. It 'should' be as simple as that.
Here is a helpful video showing the A'cad export process, which will make it a bit easier
than connecting them all in Max, which can be super-slow https://www.youtube.com/watch?v=tBnC...l=ArchVizChamp

[stevesideas]

Great. Thanks for this.

[fixeighted]

Y'welcome

[OPEN_RANGE]

Can be helpful to use normalize spline modifier before converting to terrain object.

also can be helpful, after converting to terrain object then apply retopology modifier.

[Franx]

Get the 1.87 version of Populate Terrain here :
https://github.com/mxdsa/populateTerrain.
Still using this one pretty much daily...