diff --git a/todo.txt b/todo.txt
index 7d02ef4..92d4a53 100644
--- a/todo.txt
+++ b/todo.txt
@@ -3,4 +3,5 @@
 - Implement proper light source selection for hierarchical instancing.
 - Implement shader parsing, and use in rendering.
 - Add gui display of rendering in progress.
+- Implement floating point accuracy stuff.
 - Unit tests for scene parsing.
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