diff --git a/src/am_map.c b/src/am_map.c
index e2c29f6cb..0fc8e568b 100644
--- a/src/am_map.c
+++ b/src/am_map.c
@@ -1034,7 +1034,7 @@ static void AM_drawWalls(UINT8 pass)
 		}
 		else
 		{
-			if (lines[i].flags & (ML_IMPASSABLE|ML_BLOCKPLAYERS))
+			if (lines[i].flags & (ML_IMPASSABLE|ML_EFFECT6))
 			{
 				if (pass & PASS_SOLID)
 					AM_drawMline(&l, TSWALLCOLORS); // Completely solid course boundary
@@ -1298,7 +1298,7 @@ static inline void AM_drawSpecialThingsOnly(UINT8 colors)
 		{
 			if (t->type == MT_RANDOMITEM
 			|| t->type == MT_PAPERITEMSPOT
-			|| t->type == MT_OVERTIME_CENTER
+			//|| t->type == MT_OVERTIME_CENTER
 			|| t->type == MT_RING
 			|| t->type == MT_BLUESPHERE
 			|| t->type == MT_WAYPOINT
diff --git a/src/k_terrain.c b/src/k_terrain.c
index 35f14516a..7166e2d21 100644
--- a/src/k_terrain.c
+++ b/src/k_terrain.c
@@ -1639,8 +1639,8 @@ boolean K_TerrainHasAffect(terrain_t *terrain, boolean badonly)
 {
 	if (terrain->friction > 0
 	|| terrain->offroad != 0
-	|| terrain->damageType != -1
-	|| (terrain->flags & TRF_STAIRJANK))
+	|| terrain->damageType != -1)
+	//|| (terrain->flags & TRF_STAIRJANK))
 		return true;
 
 	if (badonly)