From 50e8f13c0361e5fbab0b98492bd3f97c90150f69 Mon Sep 17 00:00:00 2001
From: Monster Iestyn <iestynjealous@ntlworld.com>
Date: Mon, 17 Jun 2019 18:46:51 +0100
Subject: [PATCH] Fix FOF slopes briefly glitching on level load in software
 mode, by ensuring the FOFs' target sectors have hasslope set on creation

---
 src/p_spec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/p_spec.c b/src/p_spec.c
index f3be86ee1c..d4ead74feb 100644
--- a/src/p_spec.c
+++ b/src/p_spec.c
@@ -4973,6 +4973,10 @@ static ffloor_t *P_AddFakeFloor(sector_t *sec, sector_t *sec2, line_t *master, f
 	// Add slopes
 	ffloor->t_slope = &sec2->c_slope;
 	ffloor->b_slope = &sec2->f_slope;
+	// mark the target sector as having slopes, if the FOF has any of its own
+	// (this fixes FOF slopes glitching initially at level load in software mode)
+	if (sec2->hasslope)
+		sec->hasslope = true;
 #endif
 
 	if ((flags & FF_SOLID) && (master->flags & ML_EFFECT1)) // Block player only
-- 
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