for polygons which are extruded the colors of all sides of the model are little bit different, which looking grat. It feels like shining. see picture
if i have complex models, which polygons are describe one by one, then there is only one color with no shining effect. see picture
so how i get this nice effect for all polygons?
i use 3dCityDB Viewer which use cesium for 3d Buildings.
They use PolygonHierarchy to describe the buildings.
i check the fabric material description but i don't get it working.