Warning, extremely old Photoshop tutorials ahead!
These Photoshop tutorials are extremely old, we're talking around 1999 here, so we can't even remember what version of Photoshop that was. So rather than get rid of them we thought we'd help out the people that still find them useful and celebrate our web design heritage by keeping them here.

For the keen eyed among you, you can even spot the extremely old HTML from back in the day when web design was a little bit simpler (Mmmm, font tags). No responsive web design here!

Start a new RGB image. The size doesn't matter and fill it with darkish (but not too dark) gray.
Click on the channels pallet and create a new channel. Click on the airbrush icon in the tool box and set the pressure to 5 in the options box.

Move the airbrush all over the image, but try not to fill it all in and leave some areas darker then others.

Choose Filter > Artistic > Pallet Knife and set the stroke size - 50, stroke detail - 3 and softness - 10. Click OK
Not click back onto layers and choose Filter > Render > Lighting Effects. The settings I used were:
  • Intensity - 21
  • Focus - 69
  • Gloss - 0
  • Material - 69
  • Exposure - 0
  • Ambience - 8
  • Texture Channel - Alpha 1 (#1)
  • White is high - Unchecked
  • Height - 31
Click OK
That's it... Try changing lighting to get different effects