diff --git a/examples/srtm.cpp b/examples/srtm.cpp
index 250e925a..9773f6c6 100644
--- a/examples/srtm.cpp
+++ b/examples/srtm.cpp
@@ -41,6 +41,9 @@
 // TODO: fix seams at tile borders
 // TODO: fix normals at closest view
 // TODO: try a different coordinate system for closer tiles
+// TODO: use closer near plane, maybe try reversed-Z
+// TODO: add space, stars, the sun
+// TODO: add atmospheric glow
 
 using namespace psemek;