From e93efb91f29bfb728850eaba6598f0c2e8cb9880 Mon Sep 17 00:00:00 2001
From: Jarrod Doyle <thejarroddoyle@gmail.com>
Date: Mon, 27 Jan 2025 18:09:46 +0000
Subject: [PATCH] Early out of valid portal checks if destination is already
 marked as mightsee

---
 KeepersCompound.Lightmapper/PotentiallyVisibleSet.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/KeepersCompound.Lightmapper/PotentiallyVisibleSet.cs b/KeepersCompound.Lightmapper/PotentiallyVisibleSet.cs
index 943d838..52afb94 100644
--- a/KeepersCompound.Lightmapper/PotentiallyVisibleSet.cs
+++ b/KeepersCompound.Lightmapper/PotentiallyVisibleSet.cs
@@ -166,6 +166,11 @@ public class PotentiallyVisibleSet
             {
                 var target = _edges[targetEdgeIdx];
                 var targetPlane = target.Poly.Plane;
+                
+                if (source.MightSee[target.Destination])
+                {
+                    continue; // target is already explored
+                }
 
                 var validTarget = false;
                 foreach (var v in target.Poly.Vertices)