- a few minor fixes.

src/p_acs.cpp

@@ -8623,8 +8623,8 @@ scriptwait:
 				{
 					screen = screen->target;
 				}
-				if (pcd == PCD_ENDHUDMESSAGEBOLD || screen == NULL ||
+				if (Level->isPrimaryLevel() && (pcd == PCD_ENDHUDMESSAGEBOLD || screen == NULL ||
-					players[consoleplayer].mo == screen)
+					players[consoleplayer].mo == screen))
 				{
 					int type = Stack[optstart-6];
 					int id = Stack[optstart-5];

src/p_conversation.cpp

@@ -739,7 +739,7 @@ void P_StartConversation (AActor *npc, AActor *pc, bool facetalker, bool saveang
 	int i;
 
 	// Make sure this is actually a player.
-	if (pc == nullptr || pc->player == nullptr || npc == nullptr || pc->Level != currentUILevel) return;
+	if (pc == nullptr || pc->player == nullptr || npc == nullptr || !pc->Level->isPrimaryLevel()) return;
 	auto Level = pc->Level;
 
 	// [CW] If an NPC is talking to a PC already, then don't let

src/p_effect.cpp

@@ -631,6 +631,8 @@ void P_DrawRailTrail(AActor *source, TArray<SPortalHit> &portalhits, int color1,
 		seg.extend = (tempvec - (seg.dir | tempvec) * seg.dir) * 3;
 		length += seg.length;
 
+		if (source->Level->isPrimaryLevel())
+		{
 			// Only consider sound in 2D (for now, anyway)
 			// [BB] You have to divide by lengthsquared here, not multiply with it.
 			AActor *mo = players[consoleplayer].camera;
@@ -639,6 +641,13 @@ void P_DrawRailTrail(AActor *source, TArray<SPortalHit> &portalhits, int color1,
 			r = clamp<double>(r, 0., 1.);
 			seg.soundpos = seg.start + r * seg.dir;
 			seg.sounddist = (seg.soundpos - mo->Pos()).LengthSquared();
+		}
+		else
+		{
+			// Set to invalid for secondary levels.
+			seg.soundpos = {0,0};
+			seg.sounddist = -1;
+		}
 		trail.Push(seg);
 	}
 
@@ -647,7 +656,7 @@ void P_DrawRailTrail(AActor *source, TArray<SPortalHit> &portalhits, int color1,
 
 	if (steps)
 	{
-		if (!(flags & RAF_SILENT))
+		if (!(flags & RAF_SILENT) && source->Level->isPrimaryLevel())
 		{
 			FSoundID sound;
 			

src/p_enemy.cpp

@@ -997,7 +997,7 @@ void P_RandomChaseDir (AActor *actor)
 
 		if (actor->FriendPlayer != 0)
 		{
-			player = players[i = actor->FriendPlayer - 1].mo;
+			player = actor->Level->Players[i = actor->FriendPlayer - 1]->mo;
 		}
 		else
 		{
@@ -1600,7 +1600,7 @@ int P_LookForPlayers (AActor *actor, INTBOOL allaround, FLookExParams *params)
 						actor->IsFriend(p->mo) &&
 						(anyone || P_IsVisible(actor, p->mo, allaround)))
 					{
-						actor->target = players[c].mo;
+						actor->target = Level->Players[c]->mo;
 
 						// killough 12/98:
 						// get out of refiring loop, to avoid hitting player accidentally

src/p_mobj.cpp

@@ -1040,22 +1040,25 @@ bool AActor::IsInsideVisibleAngles() const
 //
 // Returns true if this actor should be seen by the console player.
 //
+// Not that even for secondary maps this must check the real player!
+//
 //============================================================================
 
 bool AActor::IsVisibleToPlayer() const
 {
+	auto &p = players[consoleplayer];
 	// [BB] Safety check. This should never be NULL. Nevertheless, we return true to leave the default ZDoom behavior unaltered.
-	if ( players[consoleplayer].camera == NULL )
+	if ( p.camera == nullptr )
 		return true;
  
 	if (VisibleToTeam != 0 && teamplay &&
-		(signed)(VisibleToTeam-1) != players[consoleplayer].userinfo.GetTeam() )
+		(signed)(VisibleToTeam-1) != p.userinfo.GetTeam() )
 		return false;
 
 	auto &vis = GetInfo()->VisibleToPlayerClass;
 	if (vis.Size() == 0) return true;	// early out for the most common case.
 
-	const player_t* pPlayer = players[consoleplayer].camera->player;
+	const player_t* pPlayer = p.camera->player;
 
 	if (pPlayer)
 	{