diff --git a/src/d_player.h b/src/d_player.h
index ff4b6f40e..03efa55ec 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -78,7 +78,8 @@ typedef enum
 	PF_KICKSTARTACCEL	= 1<<4, // Accessibility feature: Is accelerate in kickstart mode?
 
 	PF_POINTME			= 1<<5, // An object is calling for my attention (via Obj_PointPlayersToMobj). Unset every frame!
-	// 1<<6 free
+
+	PF_CASTSHADOW		= 1<<6, // Something is casting a shadow on the player
 
 	PF_WANTSTOJOIN		= 1<<7, // Spectator that wants to join
 
diff --git a/src/deh_tables.c b/src/deh_tables.c
index fc33e62ef..b36fa412c 100644
--- a/src/deh_tables.c
+++ b/src/deh_tables.c
@@ -5936,7 +5936,7 @@ const char *const PLAYERFLAG_LIST[] = {
 	"KICKSTARTACCEL", // Accessibility feature: Is accelerate in kickstart mode?
 	"POINTME", // An object is calling for my attention (via Obj_PointPlayersToMobj). Unset every frame!
 
-	"\x01", // free: 1<<6 (name un-matchable)
+	"CASTSHADOW", // Something is casting a shadow on the player
 
 	"WANTSTOJOIN", // Spectator that wants to join
 
diff --git a/src/k_kart.c b/src/k_kart.c
index 11c97fd5a..fed523fc4 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -7738,6 +7738,8 @@ void K_KartPlayerThink(player_t *player, ticcmd_t *cmd)
 
 	player->cameraOffset = 0;
 
+	player->pflags &= ~(PF_CASTSHADOW);
+
 	if (player->curshield == KSHIELD_TOP)
 	{
 		mobj_t *top = K_GetGardenTop(player);
diff --git a/src/objects/hyudoro.c b/src/objects/hyudoro.c
index 552b77bfa..fba0492e3 100644
--- a/src/objects/hyudoro.c
+++ b/src/objects/hyudoro.c
@@ -560,6 +560,8 @@ hyudoro_patrol_hit_player
 	if (player->hyudorotimer)
 		return false;
 
+	player->pflags |= PF_CASTSHADOW;
+
 	// NO ITEM?
 	if (!player->itemamount)
 		return false;
diff --git a/src/r_spritefx.cpp b/src/r_spritefx.cpp
index ff0713bc8..0664819ff 100644
--- a/src/r_spritefx.cpp
+++ b/src/r_spritefx.cpp
@@ -28,6 +28,11 @@ INT32 R_ThingLightLevel(mobj_t* thing)
 			// Darken on every other frame of instawhip cooldown
 			lightlevel -= 128;
 		}
+
+		if (player->pflags & PF_CASTSHADOW)
+		{
+			lightlevel -= 255;
+		}
 	}
 
 	return lightlevel;