I have been given a sample OBJ file by a customer. It fails to load in the object inspector - which just shows a bounding box. In a workbench I get a series of messages like this:
Loaded module 'OBJ' from file 'C:\\Program Files\\FME\\plugins/obj/obj.dll'
FME API version of module 'OBJ' matches current internal version (3.8 20170315)
OBJ Reader: Reverse Face Order: 'No'
OBJ Reader: Reading in Variable FeatureType mode
OBJ Reader: Opening Dataset: 'C:\\AH_drive\\OneDrive - ESRI (UK) Ltd\\Workspace\\Glasgow3D\\CityModel\\Apr2018\\Carlton_Place_65-67_OBJ_01MAY18.obj'
OBJ Reader: Token Unsupported: 'Ni' - Ignored
OBJ Reader: continue reading with next good feature
OBJ Reader: Token Unsupported: 'Tf' - Ignored
OBJ Reader: continue reading with next good feature
OBJ Reader: Token Unsupported: 'illum' - Ignored
OBJ Reader: continue reading with next good feature
OBJ Reader: Token Unsupported: 'Ke' - Ignored
OBJ Reader: continue reading with next good feature
The exported Esri multipatch is correctly transformed but just has the building windows (the walls, roof etc are missing). I can load the OBJ file in CityEngine so I'm fairly sure I've got all the resources for it etc..