diff --git a/src/deh_tables.c b/src/deh_tables.c
index 9603ce86e..304cc2e8b 100644
--- a/src/deh_tables.c
+++ b/src/deh_tables.c
@@ -6982,6 +6982,7 @@ struct int_const_s const INT_CONST[] = {
 	{"RF_DROPSHADOW",RF_DROPSHADOW},
 	{"RF_ABSOLUTELIGHTLEVEL",RF_ABSOLUTELIGHTLEVEL},
 	{"RF_REDUCEVFX",RF_REDUCEVFX},
+	{"RF_HIDEINSKYBOX",RF_HIDEINSKYBOX},
 	{"RF_DONTDRAW",RF_DONTDRAW},
 	{"RF_DONTDRAWP1",RF_DONTDRAWP1},
 	{"RF_DONTDRAWP2",RF_DONTDRAWP2},
diff --git a/src/k_battle.c b/src/k_battle.c
index 97b134e0b..e6a971163 100644
--- a/src/k_battle.c
+++ b/src/k_battle.c
@@ -642,7 +642,7 @@ static void K_SpawnOvertimeLaser(fixed_t x, fixed_t y, fixed_t scale)
 			}
 
 			mo->angle = R_PointToAngle2(mo->x, mo->y, battleovertime.x, battleovertime.y) + ANGLE_90;
-			mo->renderflags |= (RF_DONTDRAW & ~(K_GetPlayerDontDrawFlag(player)));
+			mo->renderflags |= (RF_DONTDRAW & ~(K_GetPlayerDontDrawFlag(player))) | RF_HIDEINSKYBOX;
 
 			P_SetScale(mo, scale);
 
diff --git a/src/r_defs.h b/src/r_defs.h
index ddfe986c8..305fcecde 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -975,6 +975,7 @@ typedef enum
 
 	RF_ABSOLUTELIGHTLEVEL = 0x00010000, //  mobj_t.lightlevel is absolute instead of relative
 	RF_REDUCEVFX          = 0x00020000, //  only mobj_t.owner can see this object
+	RF_HIDEINSKYBOX       = 0x00040000, //  do not render in skybox
 
 	RF_DONTDRAW         = 0x00F00000,   // --Don't generate a vissprite
 	RF_DONTDRAWP1       = 0x00100000,   // No P1
diff --git a/src/r_things.cpp b/src/r_things.cpp
index 22163ffef..6afe405b1 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -2792,6 +2792,12 @@ void R_AddSprites(sector_t *sec, INT32 lightlevel)
 	limit_dist = (fixed_t)(cv_drawdist.value) * mapobjectscale;
 	for (thing = sec->thinglist; thing; thing = thing->snext)
 	{
+		// do not render in skybox
+		if ((thing->renderflags & RF_HIDEINSKYBOX) && portalskipprecipmobjs)
+		{
+			continue;
+		}
+
 		if (R_ThingWithinDist(thing, limit_dist))
 		{
 			const INT32 oldobjectsdrawn = objectsdrawn;