diff --git a/src/files/setup/setuppete.c b/src/files/setup/setuppete.c
index 70f00478c..b9e6f1e98 100644
--- a/src/files/setup/setuppete.c
+++ b/src/files/setup/setuppete.c
@@ -1373,7 +1373,7 @@ u8 func0412_cia[] = {
 
 	label(0x03)
 	unset_self_flag_bankx(CHRFLAG1_DONE_SEARCH_ANIM, BANK_1)
-	cmd0049(0x003e, /*goto*/ 0x04)
+	if_room_onscreen(0x003e, /*goto*/ 0x04)
 	set_padpreset(0x00ba)
 	goto_next(0x03)
 
diff --git a/src/game/chr/chraicommands.c b/src/game/chr/chraicommands.c
index 1e4da4034..7d32ae0b4 100644
--- a/src/game/chr/chraicommands.c
+++ b/src/game/chr/chraicommands.c
@@ -1883,7 +1883,7 @@ glabel ai0048
 /*  f050348:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f05034c:	84640028 */ 	lh	$a0,0x28($v1)
 .L0f050350:
-/*  f050350:	0fc575ba */ 	jal	func0f15d6e8
+/*  f050350:	0fc575ba */ 	jal	roomIsActive
 /*  f050354:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f050358:	50400003 */ 	beqzl	$v0,.L0f050368
 /*  f05035c:	8e28001c */ 	lw	$t0,0x1c($s1)
@@ -1924,13 +1924,13 @@ glabel ai0048
 /**
  * @cmd 0049
  */
-bool ai0049(void)
+bool aiIfRoomActive(void)
 {
 	u8 *cmd = g_Vars.ailist + g_Vars.aioffset;
 	u16 pad_id = cmd[3] | (cmd[2] << 8);
-	s32 value2 = chrGetPadRoom(g_Vars.chrdata, pad_id);
+	s32 room_id = chrGetPadRoom(g_Vars.chrdata, pad_id);
 
-	if (value2 >= 0 && func0f15d6e8(value2)) {
+	if (room_id >= 0 && roomIsActive(room_id)) {
 		g_Vars.aioffset = chraiGoToLabel(g_Vars.ailist, g_Vars.aioffset, cmd[4]);
 	} else {
 		g_Vars.aioffset += 5;
@@ -12940,15 +12940,15 @@ bool aiMiscellaneous(void)
 		var8006ae28 = value;
 		break;
 	case 5:
-		g_RoomPtrs[room_id].flags &= ~ROOMFLAG_00004000;
+		g_RoomPtrs[room_id].flags &= ~ROOMFLAG_4000;
 		if (value) {
-			g_RoomPtrs[room_id].flags |= ROOMFLAG_00004000;
+			g_RoomPtrs[room_id].flags |= ROOMFLAG_4000;
 		}
 		break;
 	case 6:
-		g_RoomPtrs[room_id].flags &= ~ROOMFLAG_00008000;
+		g_RoomPtrs[room_id].flags &= ~ROOMFLAG_8000;
 		if (value) {
-			g_RoomPtrs[room_id].flags |= ROOMFLAG_00008000;
+			g_RoomPtrs[room_id].flags |= ROOMFLAG_8000;
 		}
 		break;
 	case 7:
@@ -12960,9 +12960,9 @@ bool aiMiscellaneous(void)
 	case 9:
 		for (i = 1; i < g_Vars.roomcount; i++) {
 			if (value) {
-				g_RoomPtrs[i].flags |= ROOMFLAG_00004000;
+				g_RoomPtrs[i].flags |= ROOMFLAG_4000;
 			} else {
-				g_RoomPtrs[i].flags &= ~ROOMFLAG_00004000;
+				g_RoomPtrs[i].flags &= ~ROOMFLAG_4000;
 			}
 		}
 		break;
diff --git a/src/game/data/data_0083d0.c b/src/game/data/data_0083d0.c
index f4562470d..ffb2479a4 100644
--- a/src/game/data/data_0083d0.c
+++ b/src/game/data/data_0083d0.c
@@ -6292,7 +6292,7 @@ bool (*g_CommandPointers[])(void) = {
 	/*0x0046*/ aiIfNeverBeenOnScreen,
 	/*0x0047*/ ai0047,
 	/*0x0048*/ ai0048,
-	/*0x0049*/ ai0049,
+	/*0x0049*/ aiIfRoomActive,
 	/*0x004a*/ ai004a,
 	/*0x004b*/ aiIfNearMiss,
 	/*0x004c*/ aiIfSeesSuspiciousItem,
diff --git a/src/game/game_02cde0.c b/src/game/game_02cde0.c
index 4e1814ff8..c9c053e97 100644
--- a/src/game/game_02cde0.c
+++ b/src/game/game_02cde0.c
@@ -32929,7 +32929,7 @@ glabel func0f04aeb0
 /*  f04aefc:	0011c040 */ 	sll	$t8,$s1,0x1
 /*  f04af00:	84440000 */ 	lh	$a0,0x0($v0)
 .L0f04af04:
-/*  f04af04:	0fc575ba */ 	jal	func0f15d6e8
+/*  f04af04:	0fc575ba */ 	jal	roomIsActive
 /*  f04af08:	00000000 */ 	sll	$zero,$zero,0x0
 /*  f04af0c:	50400004 */ 	beqzl	$v0,.L0f04af20
 /*  f04af10:	86040002 */ 	lh	$a0,0x2($s0)
diff --git a/src/game/game_0601b0.c b/src/game/game_0601b0.c
index 7683951cc..3da8cdf84 100644
--- a/src/game/game_0601b0.c
+++ b/src/game/game_0601b0.c
@@ -4446,7 +4446,7 @@ glabel func0f063dcc
 /*  f063e34:	028e8021 */ 	addu	$s0,$s4,$t6
 /*  f063e38:	0fc456ac */ 	jal	padUnpack
 /*  f063e3c:	8e040008 */ 	lw	$a0,0x8($s0)
-/*  f063e40:	0fc575ba */ 	jal	func0f15d6e8
+/*  f063e40:	0fc575ba */ 	jal	roomIsActive
 /*  f063e44:	8fa400e8 */ 	lw	$a0,0xe8($sp)
 /*  f063e48:	104000b9 */ 	beqz	$v0,.L0f064130
 /*  f063e4c:	00000000 */ 	sll	$zero,$zero,0x0
diff --git a/src/game/game_157db0.c b/src/game/game_157db0.c
index 0108877ef..929b5278e 100644
--- a/src/game/game_157db0.c
+++ b/src/game/game_157db0.c
@@ -4319,8 +4319,8 @@ glabel func0f15b908
 /*  f15b9fc:	0c0048f2 */ 	jal	malloc
 /*  f15ba00:	24050004 */ 	addiu	$a1,$zero,0x4
 /*  f15ba04:	8e7102bc */ 	lw	$s1,0x2bc($s3)
-/*  f15ba08:	3c03800a */ 	lui	$v1,%hi(var800a492c)
-/*  f15ba0c:	2463492c */ 	addiu	$v1,$v1,%lo(var800a492c)
+/*  f15ba08:	3c03800a */ 	lui	$v1,%hi(g_MpRoomVisibility)
+/*  f15ba0c:	2463492c */ 	addiu	$v1,$v1,%lo(g_MpRoomVisibility)
 /*  f15ba10:	1a20000a */ 	blez	$s1,.L0f15ba3c
 /*  f15ba14:	ac620000 */ 	sw	$v0,0x0($v1)
 /*  f15ba18:	8c6f0000 */ 	lw	$t7,0x0($v1)
@@ -6389,33 +6389,14 @@ glabel func0f15d6c4
 /*  f15d6e4:	a4990006 */ 	sh	$t9,0x6($a0)
 );
 
-GLOBAL_ASM(
-glabel func0f15d6e8
-/*  f15d6e8:	3c0e800a */ 	lui	$t6,0x800a
-/*  f15d6ec:	8dcea2d4 */ 	lw	$t6,-0x5d2c($t6)
-/*  f15d6f0:	000450c0 */ 	sll	$t2,$a0,0x3
-/*  f15d6f4:	01445021 */ 	addu	$t2,$t2,$a0
-/*  f15d6f8:	11c00008 */ 	beqz	$t6,.L0f15d71c
-/*  f15d6fc:	3c09800a */ 	lui	$t1,0x800a
-/*  f15d700:	3c0f800a */ 	lui	$t7,0x800a
-/*  f15d704:	8def492c */ 	lw	$t7,0x492c($t7)
-/*  f15d708:	01e4c021 */ 	addu	$t8,$t7,$a0
-/*  f15d70c:	93020000 */ 	lbu	$v0,0x0($t8)
-/*  f15d710:	3059000f */ 	andi	$t9,$v0,0xf
-/*  f15d714:	03e00008 */ 	jr	$ra
-/*  f15d718:	0019102b */ 	sltu	$v0,$zero,$t9
-.L0f15d71c:
-/*  f15d71c:	8d294928 */ 	lw	$t1,0x4928($t1)
-/*  f15d720:	000a5080 */ 	sll	$t2,$t2,0x2
-/*  f15d724:	01445023 */ 	subu	$t2,$t2,$a0
-/*  f15d728:	000a5080 */ 	sll	$t2,$t2,0x2
-/*  f15d72c:	012a5821 */ 	addu	$t3,$t1,$t2
-/*  f15d730:	95620000 */ 	lhu	$v0,0x0($t3)
-/*  f15d734:	304c0004 */ 	andi	$t4,$v0,0x4
-/*  f15d738:	01801025 */ 	or	$v0,$t4,$zero
-/*  f15d73c:	03e00008 */ 	jr	$ra
-/*  f15d740:	00000000 */ 	sll	$zero,$zero,0x0
-);
+bool roomIsActive(s32 room_id)
+{
+	if (g_Vars.mplayerisrunning) {
+		return (g_MpRoomVisibility[room_id] & 0xf) != 0;
+	}
+
+	return g_RoomPtrs[room_id].flags & ROOMFLAG_ACTIVE;
+}
 
 GLOBAL_ASM(
 glabel func0f15d744
@@ -13630,8 +13611,8 @@ glabel func0f16397c
 /*  f163d40:	312e00ff */ 	andi	$t6,$t1,0xff
 /*  f163d44:	1b000030 */ 	blez	$t8,.L0f163e08
 /*  f163d48:	00001825 */ 	or	$v1,$zero,$zero
-/*  f163d4c:	3c05800a */ 	lui	$a1,%hi(var800a492c)
-/*  f163d50:	24a5492c */ 	addiu	$a1,$a1,%lo(var800a492c)
+/*  f163d4c:	3c05800a */ 	lui	$a1,%hi(g_MpRoomVisibility)
+/*  f163d50:	24a5492c */ 	addiu	$a1,$a1,%lo(g_MpRoomVisibility)
 /*  f163d54:	00002025 */ 	or	$a0,$zero,$zero
 /*  f163d58:	03203025 */ 	or	$a2,$t9,$zero
 /*  f163d5c:	01c03825 */ 	or	$a3,$t6,$zero
diff --git a/src/game/game_190260.c b/src/game/game_190260.c
index 800e71329..64dcd8329 100644
--- a/src/game/game_190260.c
+++ b/src/game/game_190260.c
@@ -1760,7 +1760,7 @@ glabel func0f1918d0
 /*  f191958:	01801825 */ 	or	$v1,$t4,$zero
 /*  f19195c:	85840028 */ 	lh	$a0,0x28($t4)
 .L0f191960:
-/*  f191960:	0fc575ba */ 	jal	func0f15d6e8
+/*  f191960:	0fc575ba */ 	jal	roomIsActive
 /*  f191964:	afa30028 */ 	sw	$v1,0x28($sp)
 /*  f191968:	14400006 */ 	bnez	$v0,.L0f191984
 /*  f19196c:	8fa30028 */ 	lw	$v1,0x28($sp)
diff --git a/src/gvars/gvars.c b/src/gvars/gvars.c
index b91222b44..dddce8f0f 100644
--- a/src/gvars/gvars.c
+++ b/src/gvars/gvars.c
@@ -21808,7 +21808,7 @@ u32 var800a491c = 0;
 u32 var800a4920 = 0;
 u32 var800a4924 = 0;
 struct room *g_RoomPtrs = NULL;
-u32 var800a492c = 0;
+u8 *g_MpRoomVisibility = NULL;
 u32 var800a4930 = 0;
 u32 var800a4934 = 0;
 u32 var800a4938 = 0;
diff --git a/src/include/commands.h b/src/include/commands.h
index cface6dd6..64bb3b583 100644
--- a/src/include/commands.h
+++ b/src/include/commands.h
@@ -609,10 +609,15 @@
 	u1, \
 	label,
 
-// Used by CIA guards in chicago
-#define cmd0049(pad, label) \
+/**
+ * Checks if a room is visible.
+ *
+ * If the room argument is 10,000 or more than it will subtract 10,000, treat
+ * it as a pad number, and use the room that the pad is in.
+ */
+#define if_room_onscreen(room, label) \
 	mkshort(0x0049), \
-	mkshort(pad), \
+	mkshort(room), \
 	label,
 
 #define if_chr_in_view(label) \
diff --git a/src/include/constants.h b/src/include/constants.h
index 24cb104f8..ec6a8bd5c 100644
--- a/src/include/constants.h
+++ b/src/include/constants.h
@@ -1544,8 +1544,9 @@
 #define RACE_EYESPY   3
 #define RACE_ROBOT    4
 
-#define ROOMFLAG_00004000 0x00004000
-#define ROOMFLAG_00008000 0x00008000
+#define ROOMFLAG_ACTIVE 0x0004
+#define ROOMFLAG_4000   0x4000
+#define ROOMFLAG_8000   0x8000
 
 #define SAVEFILEFLAG_USED_TRANSFERPAK     0x23
 #define SAVEFILEFLAG_CI_TOUR_DONE         0x24
diff --git a/src/include/game/chr/chraicommands.h b/src/include/game/chr/chraicommands.h
index e94ccf43f..15fb5c990 100644
--- a/src/include/game/chr/chraicommands.h
+++ b/src/include/game/chr/chraicommands.h
@@ -76,7 +76,7 @@
 /*0x0046*/ bool aiIfNeverBeenOnScreen(void);
 /*0x0047*/ bool ai0047(void);
 /*0x0048*/ bool ai0048(void);
-/*0x0049*/ bool ai0049(void);
+/*0x0049*/ bool aiIfRoomActive(void);
 /*0x004a*/ bool ai004a(void);
 /*0x004b*/ bool aiIfNearMiss(void);
 /*0x004c*/ bool aiIfSeesSuspiciousItem(void);
diff --git a/src/include/game/game_157db0.h b/src/include/game/game_157db0.h
index b5022b8c4..d594acba7 100644
--- a/src/include/game/game_157db0.h
+++ b/src/include/game/game_157db0.h
@@ -44,7 +44,7 @@ u32 func0f15d4a8(void);
 u32 func0f15d570(void);
 u32 func0f15d63c(void);
 u32 func0f15d6c4(void);
-u32 func0f15d6e8(u32 arg0);
+bool roomIsActive(s32 room_id);
 u32 func0f15d744(void);
 u32 func0f15d7a0(void);
 u32 func0f15d808(void);
diff --git a/src/include/gvars/gvars.h b/src/include/gvars/gvars.h
index 6e819b56a..227f324a0 100644
--- a/src/include/gvars/gvars.h
+++ b/src/include/gvars/gvars.h
@@ -764,7 +764,7 @@ extern u32 var800a491c;
 extern u32 var800a4920;
 extern u32 var800a4924;
 extern struct room *g_RoomPtrs;
-extern u32 var800a492c;
+extern u8 *g_MpRoomVisibility;
 extern u32 var800a4930;
 extern u32 var800a4bec;
 extern u32 var800a4bf0;