From 57c4ae750bd5f6077d37210d98f945da9c8c4214 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Fri, 1 May 2026 17:29:38 +0200
Subject: [PATCH] auto-git:  [change] src/viewport-three/viewport-host.ts

---
 src/viewport-three/viewport-host.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/viewport-three/viewport-host.ts b/src/viewport-three/viewport-host.ts
index c9e652e6..4ca1a6ea 100644
--- a/src/viewport-three/viewport-host.ts
+++ b/src/viewport-three/viewport-host.ts
@@ -929,6 +929,7 @@ export class ViewportHost {
   private currentTerrainBrushState: ArmedTerrainBrushState | null = null;
   private terrainBrushHover: TerrainBrushHit | null = null;
   private activeTerrainBrushStroke: ActiveTerrainBrushStroke | null = null;
+  private terrainLodGridVisibleTerrainIds = new Set<string>();
   private currentTransformPreviewTargetIds: TransformPreviewTargetIds | null =
     null;
   private creationPreviewTargetKey: string | null = null;
@@ -1584,6 +1585,22 @@ export class ViewportHost {
     }
   }
 
+  setTerrainLodGridVisibleTerrainIds(terrainIds: readonly string[]) {
+    const nextTerrainIds = new Set(terrainIds);
+
+    if (
+      nextTerrainIds.size === this.terrainLodGridVisibleTerrainIds.size &&
+      [...nextTerrainIds].every((terrainId) =>
+        this.terrainLodGridVisibleTerrainIds.has(terrainId)
+      )
+    ) {
+      return;
+    }
+
+    this.terrainLodGridVisibleTerrainIds = nextTerrainIds;
+    this.updateTerrainLodVisibility();
+  }
+
   setViewMode(viewMode: ViewportViewMode) {
     if (this.viewMode === viewMode) {
       return;