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The Lighting effects option in the Render dropdown is greyed out,
In am using a Mac Mini with 16gb Quad core, runing Mac OS 10.15.7 and the version of Photoshop is 21.2.4 (both are the latest versions available to me).
Within Photoshop I have:-
1. enabled the Graphics Processor (Itel UHD Grphics 630)
2. reset perfernces on quit
All with no effect, 'Lighting Effects' is greyed out.
Any idea's how to get this feature operational.
File must be 8 bit RGB
Thank you Bob, it came up perfectly, I just need to work out how to use it.