diff --git a/PerlinGround.hpp b/PerlinGround.hpp
index 597624c..08f3182 100644
--- a/PerlinGround.hpp
+++ b/PerlinGround.hpp
@@ -8,6 +8,7 @@ class PerlinGround : public Ground {
         PerlinGround(unsigned int seed);
         double operator() (double, double) const;
         Point get_normal(double x, double y) const;
+        PerlinNoise* get_surface() { return &surface;}
     private:
         PerlinNoise surface;
 };