The terrain is invisible. No textures are showing.
Started a new URP project.
fix is. Click created terrain in the scene, go into its settings "Base Material" and create a new URP -terrain mat. Then you can see the ground and see what you have drawn. (after removing the two installed layers.
It appears the HDA is using older shaders.
AND
if you rebuild it screws up again.
its faster to create the terrain in Houdini, save the height map and use the Unity terrain tool box to finish it.