Adding 3D Buildings to Unity

AndrewMcLane

I am creating a map based experience in Unity. I want to add a 3D buildings layer to the map. It is a location based game, so I need there to be 3D buildings wherever a user is in the world. I found this scene layer but I am getting errors when I add it to the layer like this

ArcGISBuildingSceneLayer buildingSceneLayer = new ArcGISBuildingSceneLayer(
    "https://basemaps3d.arcgis.com/arcgis/rest/services/OpenStreetMap3D_Buildings_v1/SceneServer", APIKey);
map.Layers.Add(buildingSceneLayer);

The error is 'invalid json'. 
Question 1: how do I add basic 3D buildings to the map wherever in the world a user is located?

Question 2: If I wanted to alter the appearance of these buildings (ie. make them shorter or make the top half of the buildings fade into the air (transparent)), how would I go about doing this?

and1

We just started to support OSM layers in version 1.5. Any versions earlier than that will not work. If you have 1.4 or below, you could update it to the latest version. The current release package can be found here.