From f1eaa1509f7cc4eff4037fd28f4874a963541d66 Mon Sep 17 00:00:00 2001
From: AJ Martinez <aj@worldsbe.st>
Date: Tue, 17 Oct 2023 21:48:05 -0700
Subject: [PATCH] Opaque tripwire on subtractnum maps

---
 src/p_setup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/p_setup.c b/src/p_setup.c
index b8eae1c28..307d6969a 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -3334,7 +3334,7 @@ static void P_ProcessLinedefsAfterSidedefs(void)
 
 		if (ld->tripwire)
 		{
-			ld->blendmode = (subtractTripwire ? AST_SUBTRACT : AST_ADD);
+			ld->blendmode = (subtractTripwire ? AST_COPY : AST_ADD);
 			ld->alpha = FRACUNIT;
 		}