Update corner illumination #2850

Job	Run time
Check code formatting with ruff and mypy (3.9)	1m 21s
Test and lint (ubuntu-latest, 3.9)	1m 18s
Check Readme is not outdated (3.9)	14s
Test and lint (ubuntu-latest, 3.10)	1m 4s
Test and lint (ubuntu-latest, 3.11)	1m 4s
Test and lint (ubuntu-latest, 3.12)	1m 6s
Test and lint (windows-latest, 3.9)	2m 28s
Test and lint (windows-latest, 3.10)	2m 32s
Test and lint (windows-latest, 3.11)	3m 12s
Test and lint (windows-latest, 3.12)	2m 54s
Test and lint (macos-latest, 3.9)	1m 40s
Test and lint (macos-latest, 3.10)	1m 1s
Test and lint (macos-latest, 3.11)	1m 7s
Test and lint (macos-latest, 3.12)	50s
	21m 51s

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