From a7d0825a14fa44dab6157d755dd98325cf2e913e Mon Sep 17 00:00:00 2001
From: Terry Jia <terryjia88@gmail.com>
Date: Tue, 6 Jan 2026 04:43:12 -0500
Subject: [PATCH] fix: disable frustum culling for SkinnedMesh to prevent
 clipping during animation (#7856)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Summary

SkinnedMesh bounding box is computed at rest pose and doesn't update
during animation, causing incorrect frustum culling when bones move
outside the original bounds.

fix https://github.com/Comfy-Org/ComfyUI_frontend/issues/7847

## Screenshots
before
<img width="396" height="520" alt="image"
src="https://github.com/user-attachments/assets/d2c854b5-c859-4664-9e0e-11c83775b3e7"
/>

after
<img width="949" height="656" alt="image"
src="https://github.com/user-attachments/assets/ce93d04f-1562-429f-8f2c-cb5c0ea404ae"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7856-fix-disable-frustum-culling-for-SkinnedMesh-to-prevent-clipping-during-animation-2e06d73d365081d8b585e9e4afa52d67)
by [Unito](https://www.unito.io)
---
 src/extensions/core/load3d/LoaderManager.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/extensions/core/load3d/LoaderManager.ts b/src/extensions/core/load3d/LoaderManager.ts
index 76e294d80..03002d661 100644
--- a/src/extensions/core/load3d/LoaderManager.ts
+++ b/src/extensions/core/load3d/LoaderManager.ts
@@ -166,6 +166,10 @@ export class LoaderManager implements LoaderManagerInterface {
         fbxModel.traverse((child) => {
           if (child instanceof THREE.Mesh) {
             this.modelManager.originalMaterials.set(child, child.material)
+
+            if (child instanceof THREE.SkinnedMesh) {
+              child.frustumCulled = false
+            }
           }
         })
         break
@@ -212,6 +216,10 @@ export class LoaderManager implements LoaderManagerInterface {
           if (child instanceof THREE.Mesh) {
             child.geometry.computeVertexNormals()
             this.modelManager.originalMaterials.set(child, child.material)
+
+            if (child instanceof THREE.SkinnedMesh) {
+              child.frustumCulled = false
+            }
           }
         })
         break