diff --git a/src/c3nav/mapdata/management/commands/renderstl.py b/src/c3nav/mapdata/management/commands/renderstl.py
index 39485775..2ba6ff6d 100644
--- a/src/c3nav/mapdata/management/commands/renderstl.py
+++ b/src/c3nav/mapdata/management/commands/renderstl.py
@@ -54,11 +54,14 @@ class Command(BaseCommand):
                             help=_('levels to render, e.g. 0,1,2 or * for all levels (default)'))
         parser.add_argument('--permissions', default='0', type=self.permissions_value,
                             help=_('permissions, e.g. 2,3 or * for all permissions or 0 for none (default)'))
+        parser.add_argument('--full-levels', action='store_const', const=True, default=False,
+                            help=_('render all levels completely'))
 
     def handle(self, *args, **options):
         (minx, miny), (maxx, maxy) = Source.max_bounds()
         for level in options['levels']:
-            renderer = MapRenderer(level.pk, minx, miny, maxx, maxy, access_permissions=options['permissions'])
+            renderer = MapRenderer(level.pk, minx, miny, maxx, maxy, access_permissions=options['permissions'],
+                                   full_levels=options['full_levels'])
 
             stl = renderer.render(STLEngine)
             data = stl.render()
diff --git a/src/c3nav/mapdata/render/data.py b/src/c3nav/mapdata/render/data.py
index 676a75a9..39415902 100644
--- a/src/c3nav/mapdata/render/data.py
+++ b/src/c3nav/mapdata/render/data.py
@@ -223,6 +223,8 @@ class LevelRenderData:
                     if not new_area.is_empty:
                         new_geoms.restricted_spaces_outdoors[access_restriction] = new_area
 
+                new_geoms.pk = old_geoms.pk
+                new_geoms.on_top_of_id = old_geoms.on_top_of_id
                 new_geoms.default_height = old_geoms.default_height
 
                 new_geoms.build_mesh()
@@ -280,6 +282,8 @@ class LevelGeometries:
         self.restricted_spaces_outdoors = None
         self.affected_area = None
 
+        self.pk = None
+        self.on_top_of_id = None
         self.default_height = None
 
     @staticmethod
@@ -369,6 +373,8 @@ class LevelGeometries:
         geoms.walls = buildings_geom.difference(spaces_geom).difference(doors_geom)
 
         # general level infos
+        geoms.pk = level.pk
+        geoms.on_top_of_id = level.on_top_of_id
         geoms.default_height = level.default_height
 
         return geoms
diff --git a/src/c3nav/mapdata/render/renderer.py b/src/c3nav/mapdata/render/renderer.py
index d82d3744..0f53b9e0 100644
--- a/src/c3nav/mapdata/render/renderer.py
+++ b/src/c3nav/mapdata/render/renderer.py
@@ -1,3 +1,5 @@
+from itertools import chain
+
 from django.core.cache import cache
 from django.utils.functional import cached_property
 from shapely import prepared
@@ -10,7 +12,7 @@ from c3nav.mapdata.render.engines.base import FillAttribs, StrokeAttribs
 
 
 class MapRenderer:
-    def __init__(self, level, minx, miny, maxx, maxy, scale=1, access_permissions=None):
+    def __init__(self, level, minx, miny, maxx, maxy, scale=1, access_permissions=None, full_levels=False):
         self.level = level.pk if isinstance(level, Level) else level
         self.minx = minx
         self.miny = miny
@@ -18,6 +20,7 @@ class MapRenderer:
         self.maxy = maxy
         self.scale = scale
         self.access_permissions = set(access_permissions) if access_permissions else set()
+        self.full_levels = full_levels
 
         self.width = int(round((maxx - minx) * scale))
         self.height = int(round((maxy - miny) * scale))
@@ -71,7 +74,16 @@ class MapRenderer:
 
         bbox = prepared.prep(self.bbox)
 
-        for geoms in self.level_render_data.levels:
+        if self.full_levels:
+            levels = tuple(chain(*(
+                tuple(sublevel for sublevel in LevelRenderData.get(level.pk).levels
+                      if sublevel.pk == level.pk or sublevel.on_top_of_id == level.pk)
+                for level in self.level_render_data.levels if level.on_top_of_id is None
+            )))
+        else:
+            levels = self.level_render_data.levels
+
+        for geoms in levels:
             if not bbox.intersects(geoms.affected_area):
                 continue