In this tutorial we’ll create an effect of a logo embossed in a metal sheet. Start by creating a gradient background. We used green to white to green.

In channel panel create a new alpha channel. Click on second icon from bottom right to create a new channel. this new channel is named alpha 1 by default.

Now switch to layers panel. Select filter>>render>>lighting effects. ( if you see lighting effects disabled, you are proabably working in CMYK mode. Switch to RGB mode to work with render effects).