to* 00xxh if the tile is an object tile and was defined in the current GRF with ID <xx>.
?* 0yxxh if the tile is an object tile, was defined in the current GRF with ID <xx>, and represents view number <y>.
BTW: The current lack of this feature enforces use of lots of extra object IDs, a detrimental fact, because we only have 255.
regards
Michael