<p>If feature name <fontface="monospace">more_objects_per_grf</font> is present, the Action 3 ID field is an extended byte, and GRFs may define more than 255 object types.<br/>
<p>If feature name <fontface="monospace">more_objects_per_grf</font> is present and the feature is successfully tested for, the Action 3 ID field is an extended byte, and GRFs may define more than 255 object types.<br/>
Otherwise, only 255 object types may be defined per GRF, and the extended byte format may not be used.</p>
Otherwise, only 255 object types may be defined per GRF, and the extended byte format may not be used.</p>