Tools/ue_build_demo_map.py

@@ -372,11 +372,14 @@ def build():
     # sidewalk is at Y -1912..-1053 and the SOUTH sidewalk at Y +718..+1447.
     # The hero facade is on the SOUTH side at Y +1307. Stand on the north
     # sidewalk and face south (+Y, yaw 90) across the road at it.
-    # Z 200 is clear air so the capsule settles onto the pavement instead of
-    # spawning embedded or below grade (the fall-through QA finding).
-    spawn(unreal.PlayerStart, unreal.Vector(-13336.0, -1700.0, 200.0), "Demo_PlayerStart",
+    # Z: the terrain here is ~Z 99-138. The capsule half-height is 87.5 cm, so
+    # feet must start ABOVE the surface or the point is embedded and UE rejects
+    # the PlayerStart ("NO PLAYERSTART with positive rating"), dropping the pawn
+    # at the world origin to fall through. Cap feet ~80 cm above grade: centre
+    # ~138+80+87 = 305, so Z 300 lets it drop cleanly and gravity settles it.
+    spawn(unreal.PlayerStart, unreal.Vector(-13336.0, -1700.0, 300.0), "Demo_PlayerStart",
           unreal.Rotator(pitch=0.0, yaw=90.0, roll=0.0))
-    log("staged: Demo_PlayerStart on the north sidewalk facing south (+Y)")
+    log("staged: Demo_PlayerStart on the north sidewalk (cap above grade), facing south (+Y)")
 
     # A lockable LFS .umap checks out read-only, which makes save_map silently
     # return False — chmod u+w first or the staged actors never persist.

Tools/ue_import_site.py

@@ -50,6 +50,12 @@ def import_fbx(path, name, collision="complex"):
     smd.convert_scene_unit = False
     smd.force_front_x_axis = False
     smd.normal_import_method = unreal.FBXNormalImportMethod.FBXNIM_IMPORT_NORMALS
+    # Generate collision at import. A default FBX static-mesh import creates NO
+    # collision primitives, so CTF_USE_COMPLEX_AS_SIMPLE later has nothing to use
+    # and the player falls through the walkable surfaces (observed at runtime:
+    # ground trace under the spawn hits nothing). auto_generate_collision bakes
+    # collision geometry into the mesh so the walkable plane actually blocks.
+    smd.auto_generate_collision = True
     task.options = ui
     unreal.AssetToolsHelpers.get_asset_tools().import_asset_tasks([task])