Hi, I have Photoshop CC 2015 version, and the Lightning Effects option is marked in grey, as well as other filters, while working with RAW files (opened as inteligent objects).
Can you please help me here?
I attach a pic from my screen so you can get the idea.
Thanks in advance.
Lighting Effects depends on 3D functionality, and if your system doesn't meet the requirements for 3D functionality then you also won't be able to use Lighting Effects.
You can check to see what Photoshop knows about your video card in Help->System Info. Frequently, you can solve the issue just by updating your video card driver from the GPU maker's website, picking up all their recent bug fixes.
Oh, and check the obvious - that your image is in RGB 8 bit/channel mode (because Lighting Effects doesn't support other modes or depths).