diff --git a/patches/ips/map_progress_maintain.ips b/patches/ips/map_progress_maintain.ips
index ddb13f22c..899f8658c 100644
Binary files a/patches/ips/map_progress_maintain.ips and b/patches/ips/map_progress_maintain.ips differ
diff --git a/patches/src/map_progress_maintain.asm b/patches/src/map_progress_maintain.asm
index 7552d365f..867a05261 100644
--- a/patches/src/map_progress_maintain.asm
+++ b/patches/src/map_progress_maintain.asm
@@ -114,34 +114,6 @@ mark_progress:
 activate_map_station_hook:
     LDA #$0001 : STA $0789   ; run hi-jacked instructions (set map flag)
 
-    phb
-    pea $9090
-    plb
-    plb
-
-    ; reveal specific tiles in other area maps (e.g. area transition arrows/letters)
-    lda $1F5B
-    asl
-    tax          ; X <- map_area * 2
-    lda !map_reveal_tile_table, x
-    tay          ; Y <- [map_reveal_tile_table + map_area * 2]
-
-.cross_area_reveal_loop:
-    lda $0000,y
-    beq .done_cross_area_reveal
-    tax            ; X <- address of word containing tile to reveal (relative to base at $702000 and $702700)
-    lda $0002,y    ; A <- bitmask of tile to reveal
-    ora $702000,x
-    sta $702000,x
-    lda $0002,y
-    ora $702700,x
-    sta $702700,x
-    iny : iny : iny : iny
-    bra .cross_area_reveal_loop
-
-.done_cross_area_reveal:
-    plb
-
     ; now reveal the current area's map:
     lda $1F5B
     xba
@@ -152,14 +124,14 @@ activate_map_station_hook:
     bne .partial_only_loop
 
 .loop:
-    lda #$FFFF
+    lda $829727, x
     sta $702000, x
     sta $702700, x
     inx
     inx
     dey
     bne .loop
-    rtl
+    bra .leave
 
 .partial_only_loop:
     lda #$FFFF
@@ -175,7 +147,39 @@ activate_map_station_hook:
     inx
     dey
     bne .partial_only_loop
+.leave
+    jsr cross_area_reveal
     rtl
+    
+ cross_area_reveal:
+    phb
+    pea $9090
+    plb
+    plb
+
+    ; reveal specific tiles in other area maps (e.g. area transition arrows/letters)
+    lda $1F5B
+    asl
+    tax          ; X <- map_area * 2
+    lda !map_reveal_tile_table, x
+    tay          ; Y <- [map_reveal_tile_table + map_area * 2]
+
+.cross_area_reveal_loop:
+    lda $0000,y
+    beq .done_cross_area_reveal
+    tax            ; X <- address of word containing tile to reveal (relative to base at $702000 and $702700)
+    lda $0002,y    ; A <- bitmask of tile to reveal
+    ora $702000,x
+    sta $702000,x
+    lda $0002,y
+    ora $702700,x
+    sta $702700,x
+    iny : iny : iny : iny
+    bra .cross_area_reveal_loop
+
+.done_cross_area_reveal:
+    plb
+    rts
 
 hook_mark_tile_above:
     ; run hi-jacked instruction (mark explored tile)
diff --git a/rust/maprando/src/patch.rs b/rust/maprando/src/patch.rs
index 69f414e28..349a400da 100644
--- a/rust/maprando/src/patch.rs
+++ b/rust/maprando/src/patch.rs
@@ -1102,6 +1102,36 @@ impl Patcher<'_> {
         Ok(())
     }
 
+    fn write_area_bitmask(&mut self) -> Result<()> {
+        let addr = 0x829727;
+
+        for (room_idx, room) in self.game_data.room_geometry.iter().enumerate() {
+            let room_x = self.rom.read_u8(room.rom_address + 2)?;
+            let room_y = self.rom.read_u8(room.rom_address + 3)?;
+            let area = self.map.area[room_idx];
+
+            for y in 0..room.map.len() {
+                for x in 0..room.map[y].len() {
+                    if (room.map[y][x] == 0 && room_idx != self.game_data.toilet_room_idx)
+                        || !self.map.room_mask[room_idx]
+                    {
+                        continue;
+                    }
+
+                    let (offset, bitmask) =
+                        xy_to_explored_bit_ptr(room_x + x as isize, room_y + y as isize);
+
+                    let bit_addr = addr + area * 0x100 + offset as usize;
+                    let mut curr = self.rom.read_u8(snes2pc(bit_addr))?;
+                    curr |= bitmask as isize;
+                    self.rom.write_u8(snes2pc(bit_addr), curr)?;
+                }
+            }
+        }
+
+        Ok(())
+    }
+
     fn fix_save_stations(&mut self) -> Result<()> {
         let save_station_ptrs = vec![
             0x44C5, 0x44D3, 0x44E1, 0x45CF, 0x45DD, 0x45EB, 0x45F9, 0x4607, 0x46D9, 0x46E7, 0x46F5,
@@ -3357,6 +3387,7 @@ pub fn make_rom(
     patcher.apply_mother_brain_setup_asm()?;
     patcher.apply_extra_setup_asm()?;
     patcher.write_extra_room_data()?;
+    patcher.write_area_bitmask()?;
 
     info!("CustomizeSettings: {customize_settings:?}");
     customize_rom(