From 998658f788577147f37361a66b40a9c5b8bf3faa Mon Sep 17 00:00:00 2001
From: RaveYard <29225776+MrRaveYard@users.noreply.github.com>
Date: Tue, 1 Aug 2023 15:13:49 +0200
Subject: [PATCH] Ignore UDMF lightmap keywords on sidedef as per ZDRay
 implementation

---
 src/maploader/udmf.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/maploader/udmf.cpp b/src/maploader/udmf.cpp
index fb8fd8379..ed0ec0cd3 100644
--- a/src/maploader/udmf.cpp
+++ b/src/maploader/udmf.cpp
@@ -1481,6 +1481,16 @@ public:
 					sd->Flags |= WALLF_EXTCOLOR;
 				break;
 
+			case NAME_lm_lightcolorline:
+			case NAME_lm_lightintensityline:
+			case NAME_lm_lightdistanceline:
+			case NAME_lm_sampledist_line:
+			case NAME_lm_sampledist_top:
+			case NAME_lm_sampledist_mid:
+			case NAME_lm_sampledist_bot:
+				CHECK_N(Zd | Zdt)
+					break;
+
 			default:
 				if (strnicmp("user_", key.GetChars(), 5))
 					DPrintf(DMSG_WARNING, "Unknown UDMF sidedef key %s\n", key.GetChars());