From 0035c347f433867f29d6f32703d33994f83f4728 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 19 Feb 2024 18:11:57 +0100
Subject: [PATCH] Add safety check for splatmap sampling

---
 Source/Engine/Terrain/TerrainPatch.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Source/Engine/Terrain/TerrainPatch.cpp b/Source/Engine/Terrain/TerrainPatch.cpp
index c5d1ace05..e24376f1f 100644
--- a/Source/Engine/Terrain/TerrainPatch.cpp
+++ b/Source/Engine/Terrain/TerrainPatch.cpp
@@ -610,6 +610,7 @@ FORCE_INLINE byte GetPhysicalMaterial(const Color32& raw, const TerrainDataUpdat
         uint8 layer = 0;
         uint8 layerWeight = 0;
         const int32 splatmapTextureIndex = (chunkZ * info.ChunkSize + z) * info.HeightmapSize + chunkX * info.ChunkSize + x;
+        ASSERT(splatmapTextureIndex < info.HeightmapLength);
         for (int32 splatIndex = 0; splatIndex < TERRAIN_MAX_SPLATMAPS_COUNT; splatIndex++)
         {
             for (int32 channelIndex = 0; channelIndex < 4; channelIndex++)