From 11d5a49d6faffddfddc8cd72df240217fa5cab57 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Sun, 2 Jan 2022 13:02:04 +0100
Subject: [PATCH] pgraph: Fix LightAttrib::replace_{on|off}_light()

Fixes #1153
---
 panda/src/pgraph/lightAttrib.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/panda/src/pgraph/lightAttrib.cxx b/panda/src/pgraph/lightAttrib.cxx
index 9820f1bcfa..6416525bfc 100644
--- a/panda/src/pgraph/lightAttrib.cxx
+++ b/panda/src/pgraph/lightAttrib.cxx
@@ -469,6 +469,7 @@ replace_on_light(const NodePath &source, const NodePath &dest) const {
     slobj->attrib_unref();
 
     *it = dest;
+    attrib->_on_lights.sort();
   }
   return return_new(attrib);
 }
@@ -531,6 +532,7 @@ replace_off_light(const NodePath &source, const NodePath &dest) const {
     slobj->attrib_unref();
 
     *it = dest;
+    attrib->_off_lights.sort();
   }
   return return_new(attrib);
 }