MT_SHADOW + SPR_NONE, teleports to tracer and renders only a shadow

src/deh_tables.c

@@ -369,8 +369,8 @@ const char *const STATE_LIST[] = { // array length left dynamic for sanity testi
 	"S_XDEATHSTATE",
 	"S_RAISESTATE",
 
-	// Thok
 	"S_THOK",
+	"S_SHADOW",
 
 	// SRB2kart Frames
 	"S_KART_STILL",
@@ -4705,6 +4705,7 @@ const char *const MOBJTYPE_LIST[] = {  // array length left dynamic for sanity t
 	"MT_UNKNOWN",
 
 	"MT_THOK", // Thok! mobj
+	"MT_SHADOW", // Linkdraw Shadow (for invisible objects)
 	"MT_PLAYER",
 	"MT_KART_LEFTOVER",
 	"MT_KART_TIRE",

src/info.c

@@ -28,6 +28,7 @@
 char sprnames[NUMSPRITES + 1][5] =
 {
 	"NULL", // invisible object
+	"NONE", // invisible but still rendered
 	"UNKN",
 
 	"THOK", // Thok! mobj
@@ -850,6 +851,7 @@ state_t states[NUMSTATES] =
 	{SPR_UNKN, FF_FULLBRIGHT, -1, {A_InfoState}, 6, 0, S_NULL}, // S_RAISESTATE
 
 	{SPR_THOK, FF_TRANS50, 8, {NULL}, 0, 0, S_NULL}, // S_THOK
+	{SPR_NONE, 0, -1, {NULL}, 0, 0, S_NULL}, // S_SHADOW
 
 	// Player
 	{SPR_PLAY, SPR2_STIN,					  1, {NULL}, 0, 0, S_KART_STILL},				// S_KART_STILL
@@ -5364,6 +5366,33 @@ mobjinfo_t mobjinfo[NUMMOBJTYPES] =
 		S_NULL          // raisestate
 	},
 
+	{           // MT_SHADOW
+		-1,             // doomednum
+		S_SHADOW,       // spawnstate
+		1000,           // spawnhealth
+		S_NULL,         // seestate
+		sfx_None,       // seesound
+		8,              // reactiontime
+		sfx_None,       // attacksound
+		S_NULL,         // painstate
+		0,              // painchance
+		sfx_None,       // painsound
+		S_NULL,         // meleestate
+		S_NULL,         // missilestate
+		S_NULL,         // deathstate
+		S_NULL,         // xdeathstate
+		sfx_None,       // deathsound
+		8,              // speed
+		32*FRACUNIT,    // radius
+		64*FRACUNIT,    // height
+		-1,             // display offset
+		16,             // mass
+		0,              // damage
+		sfx_None,       // activesound
+		MF_NOBLOCKMAP|MF_NOCLIP|MF_NOCLIPHEIGHT|MF_NOGRAVITY|MF_SCENERY|MF_DONTENCOREMAP, // flags
+		S_NULL          // raisestate
+	},
+
 	{           // MT_PLAYER
 		-1,             // doomednum
 		S_KART_STILL,   // spawnstate

src/info.h

@@ -576,6 +576,7 @@ extern boolean actionsoverridden[NUMACTIONS];
 typedef enum sprite
 {
 	SPR_NULL, // invisible object
+	SPR_NONE, // invisible but still rendered
 	SPR_UNKN,
 
 	SPR_THOK, // Thok! mobj
@@ -1351,8 +1352,8 @@ typedef enum state
 	S_XDEATHSTATE,
 	S_RAISESTATE,
 
-	// Thok
 	S_THOK,
+	S_SHADOW,
 
 	S_KART_STILL,
 	S_KART_STILL_L,
@@ -5723,6 +5724,7 @@ typedef enum mobj_type
 	MT_UNKNOWN,
 
 	MT_THOK, // Thok! mobj
+	MT_SHADOW, // Linkdraw Shadow (for invisible objects)
 	MT_PLAYER,
 	MT_KART_LEFTOVER,
 	MT_KART_TIRE,

src/p_mobj.c

@@ -5307,6 +5307,15 @@ static void P_MobjSceneryThink(mobj_t *mobj)
 
 	switch (mobj->type)
 	{
+	case MT_SHADOW:
+		if (mobj->tracer)
+		{
+			P_MoveOrigin(mobj,
+					mobj->tracer->x,
+					mobj->tracer->y,
+					mobj->tracer->z);
+		}
+		break;
 	case MT_BOSSJUNK:
 		mobj->renderflags ^= RF_DONTDRAW;
 		break;