fix: cinematic camera distances — no clipping, full product always visible

Redesigned all 3 segments to keep distance > 3× bsphere_radius:
- Segment 1: 3.5× → 3.0× (establishing orbit, 50mm)
- Segment 2: 3.0× → 3.2× (low angle sweep, 50→65mm)
- Segment 3: 3.2× → 4.0× (crane up, 50→40mm)

Removed: detail closeup (was 1.5-1.8×, caused object clipping),
telephoto 85mm (caused extreme close framing), DOF (not needed at safe distance)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

render-worker/scripts/cinematic_render.py

@@ -253,30 +253,31 @@ TOTAL_FRAMES = 250
 NUM_SEGMENTS = 3
 SEGMENT_LENGTH = TOTAL_FRAMES // NUM_SEGMENTS  # ~83 frames per segment
 
-# 3 segments (no closeup): establishing, detail sweep, crane up
+# 3 segments — full product always visible, no clipping
+# Distance factor is multiplied by bsphere_radius — keep > 2.5× to ensure full object is in frame
 SEGMENTS = [
-    # Segment 1: Establishing shot — orbit 45deg, push in, 50mm
+    # Segment 1: Establishing orbit — slow 60° orbit at comfortable distance
     {
-        "az_start": 0.0, "az_end": 45.0,
-        "el_start": 25.0, "el_end": 25.0,
-        "dist_start": 3.0, "dist_end": 2.5,
+        "az_start": 0.0, "az_end": 60.0,
+        "el_start": 25.0, "el_end": 20.0,
+        "dist_start": 3.5, "dist_end": 3.0,
         "lens_start": 50.0, "lens_end": 50.0,
         "dof": False,
     },
-    # Segment 2: Detail sweep — arc 45deg low, telephoto, shallow DOF
+    # Segment 2: Low angle sweep — arc 50° from lower perspective
     {
-        "az_start": 45.0, "az_end": 90.0,
-        "el_start": 10.0, "el_end": 15.0,
-        "dist_start": 1.8, "dist_end": 1.5,
-        "lens_start": 85.0, "lens_end": 85.0,
-        "dof": True,
+        "az_start": 60.0, "az_end": 110.0,
+        "el_start": 15.0, "el_end": 20.0,
+        "dist_start": 3.0, "dist_end": 3.2,
+        "lens_start": 50.0, "lens_end": 65.0,
+        "dof": False,
     },
-    # Segment 3: Crane up — rise + orbit 30deg, wide pull-back
+    # Segment 3: Crane up — rise to high angle with pull-back
     {
-        "az_start": 90.0, "az_end": 120.0,
-        "el_start": 30.0, "el_end": 60.0,
-        "dist_start": 2.0, "dist_end": 3.5,
-        "lens_start": 35.0, "lens_end": 35.0,
+        "az_start": 110.0, "az_end": 150.0,
+        "el_start": 20.0, "el_end": 50.0,
+        "dist_start": 3.2, "dist_end": 4.0,
+        "lens_start": 50.0, "lens_end": 40.0,
         "dof": False,
     },
 ]