diff --git a/TODO.md b/TODO.md
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--- a/TODO.md
+++ b/TODO.md
@@ -1,16 +1,24 @@
 # core
 
-* rewrite matrix and associated code
 * rename rect to rectangle
-
+* fields - maybe std::variant?
 
 # scripting
 
 * refactor script into something like a runtime - script
-
+* other engines?
 
 # scene
 
 * add_child and add_component should have guards - use std::lock_guard
 
+# system
+
+* filesystem walker with C++17
+
+# visual
+
+* MVP for PBR with OpenGL 3.3
+* multipass?
+