From 295191a7508194da0e74c5d63b0f2bd5f4a65b54 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Wed, 29 Apr 2026 23:00:56 +0200
Subject: [PATCH] Refactor terrain material assignment to update all meshes in
 render objects

---
 src/viewport-three/viewport-host.ts | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/viewport-three/viewport-host.ts b/src/viewport-three/viewport-host.ts
index c6f6d265..bf1a5d3a 100644
--- a/src/viewport-three/viewport-host.ts
+++ b/src/viewport-three/viewport-host.ts
@@ -8961,9 +8961,18 @@ export class ViewportHost {
     }
 
     const displayedTerrain = this.getDisplayedTerrainState(terrainId) ?? terrain;
-    const previousMaterial = renderObjects.mesh.material;
-    renderObjects.mesh.material = this.createTerrainMaterial(displayedTerrain);
+    const previousMaterial = renderObjects.material;
+    const nextMaterial = this.createTerrainMaterial(displayedTerrain);
+
+    for (const chunk of renderObjects.chunks) {
+      for (const mesh of chunk.levels) {
+        mesh.material = nextMaterial;
+      }
+    }
+
+    renderObjects.material = nextMaterial;
     previousMaterial.dispose();
+    this.updateTerrainLodVisibility();
   }
 
   private getDisplayedTerrainState(terrainId: string): Terrain | null {