This tool imports an OBJ including the MTL referencing textures from disk. Please note that the textures and MTL need to be located in the same directory as the OBJ file. The end result is Houdini geometry with correct materials assigned.
This button refreshes both the geometry and the material in Houdini from files on disk.
The OBJ file you want to load from disk.
If your MTL is located in a different location than next to the OBJ, or if it has a different name than the OBJ this parameter lets you override which MTL file to use.