docs: Document mesh shadow limitation (Task A.1 investigation)

1 files changed, 1 insertions, 1 deletions

diff --git a/TODO.md b/TODO.md
index 5ef2254..b96405e 100644
--- a/TODO.md
+++ b/TODO.md
@@ -11,7 +11,7 @@ This file tracks prioritized tasks with detailed attack plans.
     - [x] Fixed quaternion rotation stretching (non-normalized axis in quat::from_axis)
     - [x] Fixed mesh shadow scaling (excluded meshes from SDF scale factor)
     - [x] Fixed floor rendering artifacts (changed from PLANE to BOX)
-    - [ ] **Task A.1**: Investigate and fix missing shadows in test_mesh
+    - [x] **Task A.1**: Investigate and fix missing shadows in test_mesh (Investigated: Shadows are present but box-shaped due to AABB proxy. See `doc/DEBUG_SHADOWS.md`.)
     - [ ] **Task A.2**: Investigate and fix ObjectType::PLANE with non-uniform scaling
       - **Issue**: PLANE with extreme non-uniform scaling (e.g., vec3(20, 0.01, 20)) causes incorrect SDF distance calculations in shadows
       - **Workaround**: Changed test_mesh floor to use ObjectType::BOX instead