I have here to use the incredible technique of the Runtime Virtual Texture to integrate a rock in the sand of the desert /// the rock is a megascans and is rather dedicated to a forest environment /// I therefore realize a landscape and created a specific texture with 2 different materials, one with sand and the other with rock ... I simply inserted the rock on the map /// I then created a texture from Runtime Virtual and I have created instances so that I can now manage them simply //// :)