Complete rendering cleanup - all steps verified

docs/planning/rendering-cleanup-plan.md

@@ -82,13 +82,13 @@ Remove all spacecraft texture-related code:
 - Update any other documentation that references this field location
 - **PAUSE** for user review
 
-### Step 9: Final Testing
+### Step 9: Final Testing [COMPLETED]
-- Build project: `make`
+- Build project: `make` - Build successful
-- Run simulation: `make run`
+- Run simulation: `make run` - Application starts correctly, no texture errors
-- Verify spacecraft still visible via child indicators
+- Verify spacecraft still visible via child indicators - Child indicators working
-- Verify maneuver markers still render correctly
+- Verify maneuver markers still render correctly - Texture indexing working
-- Verify UI panels still display correctly
+- Verify UI panels still display correctly - Panel constants working
-- Check for any texture-related warnings or errors
+- Check for any texture-related warnings or errors - None found
 - **PAUSE** for user review
 
 ## Testing Plan