From d6993c47d613ac911e71787fd4d295dabb628d73 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Sun, 5 Apr 2026 05:59:28 +0500
Subject: [PATCH] engine: mod_bmodel: do not try to load visibility if there is
 none, like for external bmodels

---
 engine/common/mod_bmodel.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/engine/common/mod_bmodel.c b/engine/common/mod_bmodel.c
index 980956e9..08f01d1f 100644
--- a/engine/common/mod_bmodel.c
+++ b/engine/common/mod_bmodel.c
@@ -3599,6 +3599,10 @@ Mod_LoadVisibility
 */
 static void Mod_LoadVisibility( model_t *mod, dbspmodel_t *bmod )
 {
+	// external bmodels have no visibility
+	if( !bmod->visdata || !bmod->visdatasize )
+		return;
+
 	mod->visdata = Mem_Malloc( mod->mempool, bmod->visdatasize );
 	memcpy( mod->visdata, bmod->visdata, bmod->visdatasize );
 }