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diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/colors.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/colors.json
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diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/diagnose-depth.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/diagnose-depth.json
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diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/fit.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/fit.json
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diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/hybrid.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/hybrid.json
new file mode 100644
index 0000000000000000000000000000000000000000..af22c1845a8758b83fc432275f52ad16ef2691f7
--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/hybrid.json
@@ -0,0 +1,24 @@
+{
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+}
\ No newline at end of file
diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/inputs.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/inputs.json
new file mode 100644
index 0000000000000000000000000000000000000000..ba8624cfed274d40e093ccc5306f7f29832637df
--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/inputs.json
@@ -0,0 +1,199 @@
+{
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\ No newline at end of file
diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/review.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/review.json
new file mode 100644
index 0000000000000000000000000000000000000000..76ef04a2677daf0316fda310d723079ea0a836c9
--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/review.json
@@ -0,0 +1,65 @@
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+      "rerun/appearance_spline_prior.rrd": "f65f2d1a54b6b7620790367e862d675fa63b4a765cd4c8ee548b2603af74dd03"
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+}
\ No newline at end of file
diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/tube.json b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/tube.json
new file mode 100644
index 0000000000000000000000000000000000000000..30285b77f23d057641c53889f5c1feb0c606add2
--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/steps/tube.json
@@ -0,0 +1,60 @@
+{
+  "status": "ok",
+  "settings": {
+    "radius_m": 0.00295,
+    "step_t": 0.125,
+    "step_angle_deg": 30
+  },
+  "outputs": {
+    "checks": {
+      "euler_characteristic": 0,
+      "watertight": true,
+      "components": 1,
+      "winding_consistent": true,
+      "signed_volume_m3": 1.66843606958389e-05,
+      "minimum_outward_normal_dot_m": 0.002842365412735976,
+      "degenerate_triangles": 0,
+      "self_intersecting": false,
+      "maximum_radius_error_m": 7.503313237660486e-09,
+      "maximum_diameter_error_m": 1.4946250681546758e-08,
+      "bishop_seam_error": 5.960464477539063e-08,
+      "minimum_nonadjacent_centerline_distance_m": 0.01436957621459548,
+      "triangle_area_m2": {
+        "min": 5.195113028192032e-06,
+        "median": 6.751127031054331e-06,
+        "mean": 6.78027713408869e-06,
+        "max": 8.284457731867011e-06,
+        "density_max_over_min": 1.5946636169242523
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+          -0.182035431265831,
+          -0.0009961067698895931
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+      "radius_m": 0.00295,
+      "step_t": 0.125,
+      "step_angle_deg": 30,
+      "passed": true,
+      "orientation_flipped": true
+    },
+    "vertex_count": 864,
+    "triangle_count": 1728,
+    "files": {
+      "tube/tube_checks.json": "42cf6c64ffb0aaa8ef57994120a4156586eaac43060e6349d6df40322357bb99",
+      "tube/triangle_areas.npz": "ef21ed6a1d4d6a323474601cea75fd68aeb455c86b9cdf686ce59a87cb341993",
+      "tube/geometry.npz": "590c9c88de2b411083e242ac19b0c2e5c71deef60e16e16524fa7a3b6b3dbc24"
+    }
+  },
+  "code": {
+    "commit": "03793712dfbce80650569f886b6e800b9c6cace4",
+    "u_pin": "81c718790a37e5e0102eb77af2c6edd34a9db25f"
+  },
+  "wall_time_s": 3.2678916454315186
+}
\ No newline at end of file
diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/geometry.npz b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/geometry.npz
new file mode 100644
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--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/geometry.npz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:590c9c88de2b411083e242ac19b0c2e5c71deef60e16e16524fa7a3b6b3dbc24
+size 85676
diff --git a/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/triangle_areas.npz b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/triangle_areas.npz
new file mode 100644
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--- /dev/null
+++ b/sessions/session_20260921_225908_522335/preprocessing/orange-belt-prior-v1/native/tube/triangle_areas.npz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+size 14092
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