fix: cinematic camera accounts for output aspect ratio

For 16:9 (1280x720), vertical FOV is narrower than horizontal —
products could be clipped top/bottom. Now applies an aspect ratio
correction factor to camera distance: wider formats push camera
further back proportionally.

Still render (_blender_camera.py) already handled this via
min(fov_h, fov_v); cinematic now has equivalent correction.

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

render-worker/scripts/cinematic_render.py

@@ -321,14 +321,21 @@ def _get_segment_params(frame: int, bsphere_radius: float):
     return azimuth, elevation, distance, lens, use_dof
 
 
-def _setup_cinematic_camera(parts, bbox_center, bsphere_radius, total_frames):
-    """Create camera and keyframe the cinematic 4-segment animation.
+def _setup_cinematic_camera(parts, bbox_center, bsphere_radius, total_frames, width=1920, height=1080):
+    """Create camera and keyframe the cinematic animation.
+
+    Takes aspect ratio into account — wider formats push the camera
+    further back so the product isn't clipped vertically.
 
     Returns the camera object.
     """
     # Starting azimuth: offset so segment 1 starts from a good angle (40deg)
     base_azimuth = 40.0
 
+    # Aspect ratio correction: for wide formats (16:9), vertical FOV is tighter
+    # so we need more distance. For square/portrait, no correction needed.
+    aspect_correction = max(1.0, (width / height) * 0.7) if height > 0 else 1.0
+
     # Create camera
     start_az, start_el, start_dist, start_lens, _ = _get_segment_params(1, bsphere_radius)
     start_pos = _spherical_to_xyz(base_azimuth + start_az, start_el, start_dist, bbox_center)
@@ -354,6 +361,7 @@ def _setup_cinematic_camera(parts, bbox_center, bsphere_radius, total_frames):
         bpy.context.scene.frame_set(frame)
 
         azimuth, elevation, distance, lens, use_dof = _get_segment_params(frame, bsphere_radius)
+        distance *= aspect_correction  # scale for aspect ratio
         azimuth += base_azimuth  # offset from base viewing angle
 
         # Camera position from spherical coordinates
@@ -746,7 +754,7 @@ def main():
     scene.frame_start = 1
     scene.frame_end = frame_count
 
-    camera = _setup_cinematic_camera(parts, bbox_center, bsphere_radius, frame_count)
+    camera = _setup_cinematic_camera(parts, bbox_center, bsphere_radius, frame_count, width, height)
 
     # ── Colour management ────────────────────────────────────────────────────
     if not use_template: