diff --git a/examples/TUDCampus/config_bpg_comments.json b/examples/TUDCampus/config_bpg_comments.json
index f15681f7..8dbdb5d0 100644
--- a/examples/TUDCampus/config_bpg_comments.json
+++ b/examples/TUDCampus/config_bpg_comments.json
@@ -46,7 +46,8 @@
   //-- Reconstruction related
   //- Terrain
   "terrain_thinning": 90,             // Optional - percentage of randomly removed terrain points
-  "smooth_terrain":         true,     // Optional - smoothing flag
+  "smooth_terrain":   true,           // Optional - smoothing flag
+  "flat_terrain":     false,          // Optional - make terrain flat
   //- Buildings
   "lod": "1.2",
   "building_percentile": 90,