This is probably very simple, but I'm still very new to this, so I'm very confused.
I made an outline of my logo in Gimp (sorry Photoshop), and it has an alpha channel and everything so only the black outline is there. I want to know if there is any way to extrude the black lines to make it 3 dimensional.
Shape layers and Text will extrude with Ray-traced rendering enabled. Other layers will only bend. You'll have to use the pen tool or auto trace the outline of your PNG file to create a shape layer you can extrude.
There are also other ways with different plug-ins or by using different tools like Adobe Illustrator.