only render bases if Engine is_3d

src/c3nav/mapdata/render/engines/base.py

@@ -25,6 +25,8 @@ class StrokeAttribs:
 
 
 class RenderEngine(ABC):
+    is_3d = False
+
     # draw an svg image. supports pseudo-3D shadow-rendering
     def __init__(self, width: int, height: int, xoff=0, yoff=0, scale=1, buffer=0, background='#FFFFFF'):
         self.width = width

src/c3nav/mapdata/render/engines/base3d.py

@@ -8,6 +8,8 @@ from c3nav.mapdata.render.engines.base import FillAttribs, RenderEngine, StrokeA
 
 
 class Base3DEngine(RenderEngine):
+    is_3d = True
+
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 

src/c3nav/mapdata/render/renderer.py

@@ -97,7 +97,7 @@ class MapRenderer:
                       if access_restriction not in unlocked_access_restrictions)
             ).union(add_walls)
 
-            if not self.full_levels:
+            if not self.full_levels and engine.is_3d:
                 engine.add_geometry(geoms.level_base, fill=FillAttribs('#aaaaaa'))
                 if min_altitude < geoms.min_altitude:
                     engine.add_geometry(geoms.optional_base.fit(min_altitude, geoms.min_altitude+0.05),