From 1d965d75432a3d1d7f456d808a5d80dba4993e75 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Fri, 19 May 2023 04:37:53 +0300
Subject: [PATCH] ref: gl: ignore GenTextures objects that fall into reserved
 space for skyboxes

---
 ref/gl/gl_image.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/ref/gl/gl_image.c b/ref/gl/gl_image.c
index f34a2faf..057271fe 100644
--- a/ref/gl/gl_image.c
+++ b/ref/gl/gl_image.c
@@ -1421,7 +1421,16 @@ static gl_texture_t *GL_AllocTexture( const char *name, texFlags_t flags )
 
 	if( FBitSet( flags, TF_SKYSIDE ))
 		tex->texnum = tr.skyboxbasenum++;
-	else pglGenTextures( 1, &tex->texnum );
+	else
+	{
+		// keep generating new texture names to avoid collision with predefined skybox objects
+		do
+		{
+			pglGenTextures( 1, &tex->texnum );
+		}
+		while( tex->texnum >= SKYBOX_BASE_NUM &&
+			tex->texnum <= SKYBOX_BASE_NUM + SKYBOX_MAX_SIDES );
+	}
 
 	tex->flags = flags;