diff --git a/parse.c b/parse.c
index 045ecce..ed5267e 100644
--- a/parse.c
+++ b/parse.c
@@ -3259,6 +3259,11 @@ static void ExprFactor(void)
 		ExprFactor();
 		PC_AppendCmd(PCD_NEGATELOGICAL);
 		break;
+	case TK_TILDE:
+		TK_NextToken();
+		ExprFactor();
+		PC_AppendCmd(PCD_NEGATEBINARY);
+		break;
 	case TK_INC:
 	case TK_DEC:
 		opToken = tk_Token;
diff --git a/pcode.c b/pcode.c
index e36b124..436837a 100644
--- a/pcode.c
+++ b/pcode.c
@@ -440,6 +440,7 @@ static char *PCDNames[PCODE_COMMAND_COUNT] =
 	"PCD_CHANGELEVEL",
 	"PCD_SECTORDAMAGE",
 	"PCD_REPLACETEXTURES",
+	"PCD_NEGATEBINARY",
 	
 };
 
diff --git a/pcode.h b/pcode.h
index 5c15a28..e80d243 100644
--- a/pcode.h
+++ b/pcode.h
@@ -390,6 +390,7 @@ typedef enum
 	PCD_CHANGELEVEL,
 	PCD_SECTORDAMAGE,
 	PCD_REPLACETEXTURES,
+	PCD_NEGATEBINARY,
 
 	PCODE_COMMAND_COUNT
 } pcd_t;
diff --git a/zspecial.acs b/zspecial.acs
index c530565..a9e0093 100644
--- a/zspecial.acs
+++ b/zspecial.acs
@@ -105,6 +105,11 @@ special
 	127:Thing_SetSpecial(5),
 	128:ThrustThingZ(4),
 	139:Thing_SpawnFacing(2,4),
+	159:Sector_SetPlaneReflection(3),	// GZDoom only!
+	//160:Sector_Set3DFloor				// GZDoom/Vavoom
+	//161:Sector_SetContents			// Vavoom
+	170:Sector_SetCeilingScale2(3),
+	171:Sector_SetFloorScale2(3),
 	172:Plat_UpNearestWaitDownStay(3),
 	173:NoiseAlert(2),
 	174:SendToCommunicator(4),