From bf9c5849e86f776e85cb69bf3c02396a985aa0b3 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Thu, 8 Aug 2019 08:09:31 +0200
Subject: [PATCH] - merged all useful parts from
 https://github.com/coelckers/gzdoom/pull/725

---
 wadsrc/static/zscript/level_compatibility.zs | 44 ++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/wadsrc/static/zscript/level_compatibility.zs b/wadsrc/static/zscript/level_compatibility.zs
index 6c02b912a1..5e96b3f473 100644
--- a/wadsrc/static/zscript/level_compatibility.zs
+++ b/wadsrc/static/zscript/level_compatibility.zs
@@ -628,6 +628,24 @@ class LevelCompatibility native play
 				break;
 			}
 			
+			case '6C620F43705BEC0ABBABBF46AC3E62D2': // Doom II MAP10
+			{
+				// Allow player to leave exit room
+				SetLineSpecial(786, Door_Raise, 0, 16, 150, 0);
+				SetLineActivation(786, SPAC_Use);
+				SetLineFlags(786, Line.ML_REPEAT_SPECIAL);
+				break;
+			}
+			
+			case '1AF4DEC2627360A55B3EB397BC15C39D': // Doom II MAP12
+			{
+				// Missing texture
+				SetWallTexture(648, Line.back, Side.bottom, "PIPES");
+				// Remove erroneous tag for teleporter at the south building
+				ClearSectorTags(149);
+				break;
+			}
+			
 			case 'FBA6547B9FD44E95671A923A066E516F': // Doom II MAP13
 			{
 				// Missing texture
@@ -671,6 +689,7 @@ class LevelCompatibility native play
 			
 			case '1A540BA717BF9EC85F8522594C352F2A': // Doom II, map15
 			{
+				// Remove unreachable secret
 				SetSectorSpecial(147, 0);
 				// Missing textures
 				SetWallTexture(94, Line.back, Side.top, "METAL");
@@ -716,6 +735,9 @@ class LevelCompatibility native play
 				{
 					SetWallTextureID(286+i, Line.back, Side.bottom, STEP4);
 				}
+				// Southwest teleporter in the teleporter room now works on
+				// easier difficulties
+				SetThingSkills(112, 31);
 				break;
 			}
 			
@@ -727,6 +749,13 @@ class LevelCompatibility native play
 				break;
 			}
 			
+			case '4AA9B3CE449FB614497756E96509F096': // Doom II MAP22
+			{
+				// Only use switch once to raise sector to rocket launcher
+				SetLineFlags(120, 0, Line.ML_REPEAT_SPECIAL);
+				break;
+			}
+			
 			case '94893A0DC429A22ADC4B3A73DA537E16': // Doom II MAP25
 			{
 				// Missing texture at bloodfall near level start
@@ -743,8 +772,17 @@ class LevelCompatibility native play
 			
 			case '110F84DE041052B59307FAF0293E6BC0': // Doom II, map27
 			{
+				// Remove unreachable secret
 				SetSectorSpecial(93, 0);
+				// Missing texture
 				SetWallTexture(582, Line.back, Side.top, "ZIMMER3");
+				// Make line near switch to level exit passable
+				SetLineFlags(342, 0, Line.ML_BLOCKING);
+				// Can leave Pain Elemental room if stuck
+				SetLineSpecial(580, Door_Open, 0, 16);
+				SetLineActivation(580, SPAC_Use);
+				SetLineSpecial(581, Door_Open, 0, 16);
+				SetLineActivation(581, SPAC_Use);
 				break;
 			}
 			
@@ -761,6 +799,12 @@ class LevelCompatibility native play
 				SetWallTexture(531, Line.back, Side.top, "WOOD8");
 				SetWallTexture(547, Line.back, Side.top, "WOOD8");
 				SetWallTexture(548, Line.back, Side.top, "WOOD8");
+				// Raise holes near level exit when walking over them
+				for(int i=0; i<12; i++)
+				{
+					SetLineSpecial(584+i, Floor_RaiseToNearest, 5, 8);
+					SetLineActivation(584+i, SPAC_Cross);
+				}
 				break;
 			}