Update gausian illumination #2851

Job	Run time
Check Readme is not outdated (3.9)	11s
Test and lint (ubuntu-latest, 3.9)	1m 21s
Check code formatting with ruff and mypy (3.9)	1m 19s
Test and lint (ubuntu-latest, 3.10)	1m 9s
Test and lint (ubuntu-latest, 3.11)	1m 2s
Test and lint (ubuntu-latest, 3.12)	1m 5s
Test and lint (windows-latest, 3.9)	3m 7s
Test and lint (windows-latest, 3.10)	2m 24s
Test and lint (windows-latest, 3.11)	2m 38s
Test and lint (windows-latest, 3.12)	2m 41s
Test and lint (macos-latest, 3.9)	1m 30s
Test and lint (macos-latest, 3.10)	1m 2s
Test and lint (macos-latest, 3.11)	1m 19s
Test and lint (macos-latest, 3.12)	1m 1s
	21m 49s

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