Lighten Effects under render are greyed out/disabled

[DAJ Holmes]

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.

John

[Bob_Hallam · Accepted solution]

File must be 8 bit RGB

[DAJ Holmes]

Thank you Bob, it came up perfectly, I just need to work out how to use it.