From dcf6778423487c3756a1f48ed8511871882fdf84 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Sun, 3 May 2026 13:35:13 +0200
Subject: [PATCH] Improve hysteresis distance calculation and add view frustum
 checks for foliage culling

---
 src/foliage/foliage-render-batches.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/foliage/foliage-render-batches.ts b/src/foliage/foliage-render-batches.ts
index 8fa2d2a7..9a180c4a 100644
--- a/src/foliage/foliage-render-batches.ts
+++ b/src/foliage/foliage-render-batches.ts
@@ -126,9 +126,15 @@ function distanceFromPointToCachedChunkCenter(
 }
 
 function getHysteresisDistance(distance: number, ratio: number): number {
+  const normalizedRatio = Math.max(0, ratio);
+
+  if (normalizedRatio <= 0) {
+    return 0;
+  }
+
   return Math.max(
     MIN_FOLIAGE_LOD_HYSTERESIS_DISTANCE,
-    Math.max(0, distance) * Math.max(0, ratio)
+    Math.max(0, distance) * normalizedRatio
   );
 }
 
@@ -569,6 +575,8 @@ export function resolveFoliageRenderChunkLod(options: {
   }
 
   if (
+    options.view.frustum !== null &&
+    options.view.frustum !== undefined &&
     shouldCullCachedFoliageRenderChunkByFrustum({
       chunk: options.chunk,
       frustum: options.view.frustum,