Hey,
How to reduce number of triangles in existing terrain model? I can not import point cloud again.
Is there an option to filter triangles after the slope to merge triangles with similar slope?
It might be a bit cumbersome, but one way to reduce the amount of triangulation is simply by dropping the terrain model. Then create a mesh from it (ensure you're in the 3D model, go to the modeling - mesh ribbon), where you can also find functionality to simplify a mesh. Once the mesh is simplified, you can then create terrain from it again using the terrain functionality in the openroads ribbon.