diff --git a/docs/landscape.html b/docs/landscape.html
--- a/docs/landscape.html
+++ b/docs/landscape.html
@@ -370,6 +370,8 @@ exit towards: <tt>47</tt> - NE, <tt>48</
 <li>map_owner: <a href="#OwnershipInfo">owner</a> of the station</li>
 <li>map2: index into the <a href="#_StationArray">array of stations</a></li>
 <li>map3_lo bits 0..3: <a href="#TrackType">track type</a> for railway stations, must be 0 for all the other stations</li>
+<li>map3_lo bit 4 = use custom sprite (valid only railway stations FOR NOW)</li>
+<li>map3_hi = custom station id</li>
 </ul>
 </td></tr>