diff --git a/assets/models/blender/npc/npc_casual.glb b/assets/models/blender/npc/npc_casual.glb
index d51b152..9268b59 100644
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diff --git a/assets/models/blender/npc/npc_coat.glb b/assets/models/blender/npc/npc_coat.glb
index 7be0357..d27e65b 100644
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diff --git a/assets/models/blender/npc/npc_crowd_a.glb b/assets/models/blender/npc/npc_crowd_a.glb
index 116aa78..e8c26f4 100644
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diff --git a/assets/models/blender/npc/npc_crowd_b.glb b/assets/models/blender/npc/npc_crowd_b.glb
index d937422..fde6cf4 100644
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diff --git a/assets/models/blender/npc/npc_crowd_c.glb b/assets/models/blender/npc/npc_crowd_c.glb
index f516fa2..52e9d7c 100644
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diff --git a/assets/models/blender/npc/npc_crowd_d.glb b/assets/models/blender/npc/npc_crowd_d.glb
index 26db046..413fde9 100644
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diff --git a/assets/models/blender/npc/npc_crowd_d_ao.png b/assets/models/blender/npc/npc_crowd_d_ao.png
index b38f11b..3c1715f 100644
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diff --git a/assets/models/blender/npc/npc_dress.glb b/assets/models/blender/npc/npc_dress.glb
index da5c8a2..2cb4300 100644
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diff --git a/assets/models/blender/npc/npc_firefighter.glb b/assets/models/blender/npc/npc_firefighter.glb
index 7b4903b..e6e8f27 100644
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diff --git a/assets/models/blender/npc/npc_guard.glb b/assets/models/blender/npc/npc_guard.glb
index f73b29f..5d48ff4 100644
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diff --git a/assets/models/blender/npc/npc_hoodie.glb b/assets/models/blender/npc/npc_hoodie.glb
index 5ab7544..e1357ad 100644
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diff --git a/assets/models/blender/npc/npc_hoodie_ao.png b/assets/models/blender/npc/npc_hoodie_ao.png
index 8843579..e8d672e 100644
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diff --git a/assets/models/blender/npc/npc_jacket.glb b/assets/models/blender/npc/npc_jacket.glb
index 814d9e3..8a896d2 100644
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diff --git a/assets/models/blender/npc/npc_vest.glb b/assets/models/blender/npc/npc_vest.glb
index c63c795..a65609f 100644
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diff --git a/tools/blender_assets.py b/tools/blender_assets.py
index f4b27ba..31ec037 100644
--- a/tools/blender_assets.py
+++ b/tools/blender_assets.py
@@ -676,9 +676,17 @@ def _auto_weights(obj, layout, rigid=None):
                 if abs(p.x) > 0.23:
                     allowed.remove("Spine")
         elif p.z < 0.80:
-            allowed = ["Hips", f"Hip{side}", f"Knee{side}"]
-            if p.z < 0.66:
-                allowed.remove("Hips")
+            # Legs: keep the shin rigid to the knee and the thigh rigid to the
+            # hip, with a short blend only at the knee joint, so deep flexion
+            # (seated) no longer collapses the thigh or pinches the knee.
+            if p.z < 0.28:
+                allowed = [f"Knee{side}"]
+            elif p.z < 0.34:
+                allowed = [f"Hip{side}", f"Knee{side}"]
+            elif p.z < 0.62:
+                allowed = [f"Hip{side}"]
+            else:
+                allowed = ["Hips", f"Hip{side}"]
         elif p.z > 1.40:
             allowed = ["Spine", "Neck", "Head"]
         else: