From 5db3db539af8abe32494a94e19ea1e8711956a45 Mon Sep 17 00:00:00 2001
From: Marco Cawthorne <marco@vera-visions.com>
Date: Wed, 13 Sep 2023 07:56:11 -0700
Subject: [PATCH] Client/Server: Handle 'skyname' universally and guess on the
 client whether we're using a Source Engine style skybox path

---
 src/client/sky.qc   | 17 ++++++++++++++++-
 src/server/entry.qc |  2 +-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/client/sky.qc b/src/client/sky.qc
index 9dde3083..14b4d4cd 100644
--- a/src/client/sky.qc
+++ b/src/client/sky.qc
@@ -16,12 +16,27 @@
 
 var string g_strSkyName;
 
+bool
+Sky_SourceBSPCheck(string sky)
+{
+	if not (whichpack(strcat("materials/skybox/", sky, "bk.vmt")))
+		return false;
+
+	return true;
+}
+
 void
 Sky_Update(int force)
 {
 	if (g_strSkyName != serverkey("skyname") || force == TRUE) {
 		g_strSkyName = serverkey("skyname");
-		localcmd(sprintf("sky \"%s\"\n", g_strSkyName));
+
+		/* is it a Source Engine material? */
+		if (Sky_SourceBSPCheck(g_strSkyName))
+			localcmd(sprintf("sky \"materials/skybox/%s\"\n", g_strSkyName));
+		else
+			localcmd(sprintf("sky \"%s\"\n", g_strSkyName));
+
 		print(sprintf("sky update applying %s.\n", g_strSkyName));
 	}
 }
diff --git a/src/server/entry.qc b/src/server/entry.qc
index 476b18cc..e652b0d3 100644
--- a/src/server/entry.qc
+++ b/src/server/entry.qc
@@ -485,8 +485,8 @@ worldspawn(void)
 		if (!self.skyname) {
 			self.skyname = "desert";
 		}
-		forceinfokey(world, "skyname", self.skyname);
 	}
+	forceinfokey(world, "skyname", self.skyname);
 
 	print("Spawning entities\n");
 }