From 4b956a2f2b4ac964c96fb37b68f9d7fd9657a68d Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Thu, 20 Oct 2016 09:56:45 +0200
Subject: [PATCH] - added support for the skyoffset property that had been
 settable in ANIMDEFS for GZDoom. This will only have an effect in sky mode 2.

---
 src/r_sky.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/r_sky.cpp b/src/r_sky.cpp
index 58caa09bd..37312cbae 100644
--- a/src/r_sky.cpp
+++ b/src/r_sky.cpp
@@ -48,6 +48,11 @@ bool		skystretch;
 fixed_t		sky1cyl,		sky2cyl;
 double		sky1pos,		sky2pos;
 
+CUSTOM_CVAR(Int, testskyoffset, 0, 0)
+{
+	R_InitSkyMap();
+}
+
 // [RH] Stretch sky texture if not taller than 128 pixels?
 // Also now controls capped skies. 0 = normal, 1 = stretched, 2 = capped
 CUSTOM_CVAR (Int, r_skymode, 2, CVAR_ARCHIVE)
@@ -55,6 +60,7 @@ CUSTOM_CVAR (Int, r_skymode, 2, CVAR_ARCHIVE)
 	R_InitSkyMap ();
 }
 
+
 int			freelookviewheight;
 
 //==========================================================================
@@ -108,7 +114,7 @@ void R_InitSkyMap ()
 	}
 	else if (skyheight > 200)
 	{
-		skytexturemid = (200 - skyheight) * skytex1->Scale.Y;
+		skytexturemid = (200 - skyheight) * skytex1->Scale.Y +(r_skymode == 2 ? skytex1->SkyOffset + testskyoffset : 0);
 	}
 
 	if (viewwidth != 0 && viewheight != 0)