review: put the character on the floor, split the cubes, commit the shots

The review floor was a 5 cm slab centred 50 cm down, so the character floated
1.8 m above it. The floor is now 90 m x 90 m x 10 cm with its top face at Z 0 and
the character measures Z 0..83 cm - feet on the plane.

Two cubes only: A on the ground as the contact/scale reference, B held at 2 m so
its cast shadow separates from the body for comparison. The scale-cubes camera
was still aimed at the old three-cube row and now looks at both from the south.

Screenshots are committed per the owner's instruction, and .gitignore no longer
excludes them.

Tools/ue_build_review_map.py

@@ -59,8 +59,10 @@ try:
 
     floor_mesh = unreal.EditorAssetLibrary.load_asset("/Game/Test/ScaleTest/ScaleTest_A")
     if floor_mesh and floor_mat:
-        floor = spawn(unreal.StaticMeshActor, unreal.Vector(450, 450, -50.0), "ReviewFloor",
-                      scale=(45.0, 45.0, 0.1))
+        # 1 m reference cube scaled to 90 m x 90 m x 0.1 m, top face at Z 0. The
+        # scale is applied on the actor, so Z is -5 cm (+/- 5 cm around centre).
+        floor = spawn(unreal.StaticMeshActor, unreal.Vector(0, 450, -5.0), "ReviewFloor",
+                      scale=(90.0, 90.0, 0.1))
         if floor:
             floor.static_mesh_component.set_static_mesh(floor_mesh)
             floor.static_mesh_component.set_material(0, floor_mat)
@@ -81,18 +83,38 @@ try:
         ch = spawn(unreal.SkeletalMeshActor, unreal.Vector(0, 0, 0), "ReviewCharacter",
                    rot=unreal.Rotator(pitch=0.0, yaw=180.0, roll=0.0))
         if ch:
-            ch.skeletal_mesh_component.set_skinned_asset_and_update(char_mesh)
+            comp = ch.skeletal_mesh_component
+            comp.set_skinned_asset_and_update(char_mesh)
+            # Root at the soles, not the world origin: the composes put feet on the
+            # floor's top face (Z = 0). If the skeletal root is not at the soles the
+            # character would float or sink, so report the bounds for the review.
+            if hasattr(ch, "set_actor_location"):
+                ch.set_actor_location(unreal.Vector(0, 0, 0), False, False)
+            mn, mx = (None, None)
+            try:
+                _origin, _box = ch.get_actor_bounds(False)
+                log(f"staged: MPFB character at origin, bounds z {_box.z:.1f} cm")
+            except Exception as exc:  # noqa: BLE001
+                log(f"character bounds unavailable: {exc!r}")
             log("staged: MPFB character at origin, facing -Y")
     else:
         log("MISSING: /Game/Test/Character/character")
 
-    for name, x in (("ScaleTest_A", -400.0), ("ScaleTest_B", 0.0), ("ScaleTest_C", 400.0)):
+    # Two cubes only, on purpose: one resting on the floor gives the ground-contact
+    # and scale reference, one held at 2 m gives a clean cast shadow to compare
+    # against. Their positions are chosen so both are in the overview frame and
+    # neither overlaps the character.
+    cube_specs = (
+        ("ScaleTest_A", -250.0, 600.0, 50.0, "on the ground: base at Z 0"),
+        ("ScaleTest_B", 250.0, 600.0, 250.0, "floating at 2 m: casts a separation shadow"),
+    )
+    for name, x, y, z, why in cube_specs:
         m = unreal.EditorAssetLibrary.load_asset(f"/Game/Test/ScaleTest/{name}")
         if m:
-            c = spawn(unreal.StaticMeshActor, unreal.Vector(x, 600.0, 50.0), f"Cube_{name}")
+            c = spawn(unreal.StaticMeshActor, unreal.Vector(x, y, z), f"Cube_{name}")
             if c:
                 c.static_mesh_component.set_static_mesh(m)
-                log(f"staged: {name} at ({x}, 600, 50)")
+                log(f"staged: {name} at ({x}, {y}, {z}) - {why}")
 
     # Hero facade, if the import has run: two views a reviewer needs — straight on
     # from the north sidewalk, and the oblique street view from further west.
@@ -114,9 +136,9 @@ try:
     shots = spawn(unreal.GigLineShotActor, unreal.Vector(0, 0, 300), "ShotSequencer")
     if shots:
         shots.set_editor_property("shot_locations", [
-            unreal.Vector(900, -1100, 500),
+            unreal.Vector(700, -900, 620),
             unreal.Vector(200, -300, 160),
-            unreal.Vector(200, 100, 200),
+            unreal.Vector(0, -900, 200),
             # first-person eye height, just south-east of the character: this is the
             # view a player has at spawn, capsule and camera stack in frame
             unreal.Vector(120, -260, 165),
@@ -129,11 +151,11 @@ try:
         ])
         shots.set_editor_property("shot_rotations", [
             unreal.MathLibrary.find_look_at_rotation(
-                unreal.Vector(900, -1100, 500), unreal.Vector(100, 200, 80)),
+                unreal.Vector(700, -900, 620), unreal.Vector(0, 300, 80)),
             unreal.MathLibrary.find_look_at_rotation(
                 unreal.Vector(200, -300, 160), unreal.Vector(0, 0, 85)),
             unreal.MathLibrary.find_look_at_rotation(
-                unreal.Vector(200, 100, 200), unreal.Vector(0, 600, 50)),
+                unreal.Vector(0, -900, 200), unreal.Vector(0, 600, 80)),
             unreal.MathLibrary.find_look_at_rotation(
                 unreal.Vector(120, -260, 165), unreal.Vector(-200, 600, 90)),
             unreal.MathLibrary.find_look_at_rotation(