Corresponds to whether the player has already seen the image for the following rooms:

Bit	Room ID	Room Name
0	3	Your Ship
1	8	The Dunes
2	9	The Dunes
3	10	The Dunes
4	108	The Bridge
5	62	The Cave Mouth
6	106	The Mighty Rock Door
7	31	The Cannibals' Village

Bit	Room ID	Room Name
0	40	The Cliff Path
1	41	The Cliff Path
2	42	The Cliff Path
3	82	The Vast Cavern
4	98	The Pirate Treasure Chamber
5	N/A	N/A
6	N/A	N/A
7	N/A	N/A

Used by the routine at Handler_DisplayRoomImage but uses the bit index from Table_RoomsWithImages.