I need it to be in roblox, with the mesh being represented by smooth terrain (its breddy big)
I believe there was once a plugin for creating smooth terrain out of an .obj file, but can’t anymore find that.
I could possibly create a heightmap from it and use @VolcanoINC 's Heightmap importer, but it makes everything blocky, needing dozens of hours of after-edits to smoothen out all the terrain
So how would I go about this, or are there better ways?
Well sadly it seems the library you recommended isn’t able to handle my terrain causing script timeouts (its a bit over a million lines in .obj format)