diff --git a/examples/srtm.cpp b/examples/srtm.cpp
index 6351d05b..250e925a 100644
--- a/examples/srtm.cpp
+++ b/examples/srtm.cpp
@@ -36,6 +36,12 @@
 #include <unordered_map>
 #include <unordered_set>
 
+// TODO: use LRU cache for tile generation requests, combine with threadpool
+// TODO: fix frustum culling
+// TODO: fix seams at tile borders
+// TODO: fix normals at closest view
+// TODO: try a different coordinate system for closer tiles
+
 using namespace psemek;
 
 template <typename Value, typename T>