The Lighting Effects filter is only available when you launch Photoshop in 32-bit mode.
If on a Mac, do a Get Info (Command I) in the Finder on the application icon and check the 32-bit mode box before launching Photoshop.
In Windows, I understand separate 32-bit and 64-bit versions of Photoshop are installed.
Actually, filter > render > lighting effects is in the 64 bit version of Photoshop. ( It looks a bit different from what you see if you open the Windows 32 bit version and navigate there) The New Lighting Effects Gallery is one of the GPU features and must be run on a compatible video card with 512MB (not available on Win XP)
How do you mean that LFX (lighting effects) doesn't appear in the layers as a filter?
If you run LfX on a layer it'll apply it to a layer like any other filter would, and as another option you can also use it with smart filters
target your layer -> Filter > Convert for smart filters -> Filter > Render Lighting Effects
This way you can go back into the layer and edit the LFX as you please.
As for applying a pattern "overlay" it would make sense that your'e overlaying a pattern over a layer for it to cover the layer up.
If you'd like to blend the pattern, that is totally up to you, and available using the Pattern Overlay layer style options in the dialog such as:
Blend mode: try "Overlay" or another blend mode to get desired result
Opacity: lower the opacity of the Pattern to see what's underneath.
Hope this helps.
The 32bit option in file info has been removed for CS6 on the Mac, it's 64bit only.
Perhaps you already knew that, since your screenshot shows the CS5 file info dialog
Yes, I had even mentioned that myself in another post.
As I said in my response to Pattie, I'm sorry I even mentioned the Windows version, which only managed to get me utterly confused. Hope everyone else is ignoring me. If not, I apologize.