The skylight tool is still there.
Make sure you have a standard Work Environment installed.
If you have a custom one it may not include the skylight tool.
Also look in the menus - DESIGN >DESIGN TOOLS to see if the skylight tool is there.
That is another way to access it.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11