diff --git a/examples/grass.cpp b/examples/grass.cpp
index 6e1596c4..09788181 100644
--- a/examples/grass.cpp
+++ b/examples/grass.cpp
@@ -440,9 +440,8 @@ struct grass_app
 					grass_program["u_height10"] = h10;
 					grass_program["u_height11"] = h11;
 					grass_mesh.draw(0, ((i + 1) * grass_mesh.index_count()) / N);
-//					grass_mesh.draw();
 
-					triangles += grass_mesh.index_count() / 3;
+					triangles += (((i + 1) * grass_mesh.index_count()) / N) / 3;
 				}
 			}
 		}