Actually i on the project that can render 3D DXF extension file to Cesium. I can load it by changing to SHP first with qGis app, but the tester want to make it as simple as “drag and drop” to load (since the data is very sensitive). my “Drag and drop” dxf still buggy (still working and searching algorithm to read dxf file), but if cesium has it that would be awesome. When this app ready to launched, i gonna upgrade my Cesium as well. Thank you.