By default, HtoA will automatically create an Arnold properties tab on newly created OBJs. It is possible to prevent the automatic creation of properties by setting the HTOA_AUTOPROP environment variable to 0. You can then manually add Arnold properties to a selection of OBJs by clicking Add Arnold Properties in the toolbar:
or by using Tab > Arnold > Add Arnold Properties in the network editor:
Similarly, the properties can be removed with Remove Arnold Properties on the toolbar or tab menu.
Note that the Arnold properties are regular Houdini spare parameters that are prefixed the ar_ to emphasize that they are specific to Arnold.
Arnold properties can be added to the following objects.