These are all brush strokes, folks.
I'm using the "Subway" font. If you want to use it, too, you can grab it here.
Best viewed FULL screen.
Now on to the tutorial:
Make your drawing window BIG (640 x 640), transparent, and at least 300 dpi.
Type whatever it is you want to make a text effect of (i.e. your name, a title, etc.). Enlarge the font so that it takes up most of the width of the new drawing.
STEP 3: Using the Perspective tool, slightly angle the top of the text down toward the horizon (middle point of your text height):
You can lay it down even more, if you want, but keep in mind, the flatter you lay the text down, the smaller it gets.
Now would be a good time to delete the transparent background layer. Crop the text to a decent, even size:
The fun begins. Now that you have it in the perspective you want, and cropped to size, it's time to make it into an AWESOME animated brush. Save the file as whatever you wish to name it, but use the extension .gih, (Save the file to your .gimp-2.6/brushes folder):
These are also the settings for your new animated brush.
The final step is "refreshing" your brushes and then testing out the new brush:
Using the Airbrush tool, selecting "Use color from gradient" start drawing with your new text brush, changing the gradients to test with. Now that you got this covered, you can always make new text brushes for other names or titles, etc.
(NOTE: If you don't feel like saving a bunch of text brushes in your brushes dialog, you can circumvent making the text into brushes by simply saving the text to an alpha selection, copying the selection - this automatically creates a brush default in your brushes dialog and will remain there until you copy another selection or image. While having the copied text selected, simply move the spacing slider down to 1 and off you go making cool 3D effects.)
Here is just one example of the kinds of cool effects you can make using this text brush:
I used the text brush set at Incandescent gradient and in combination with Bernhard Stockmann's "Hot text on flames/fire" tutorial found here.
The trick here is to do Bernhard's tutorial first, using the text brush you made, setting both foreground and background colors to white, when using color as a gradient. You'll have to make the background black, the text white. Once you follow that tutorial through to the end, then set your text brush to the incandescent gradient, and work your way up.
If none of this is making any sense to you, leave a comment. If I get enough requests I'll just create the tutorial for this effect.