Cloud

This is a good example of cloud text effect.
You can get it by yourself in [Procedural Text Effects] / [Cloud] / [Cloud 4].

Here you see the text used as base for the effect showed in sequence (text generated using the "Preview Text" button).
This kind of font is very good for cloud effect because all these face irregularities help to get a more random and irregular cloud in the result. This font's name is "Acidic".

Here you see the result of the cloud effect created having the above text as input.

Fire

Here is a nice example of fire text effect.
You can get it by yourself in [Procedural Text Effects] / [Fire] / [Fire].

It's the text used as input for the effect showed below (got using the "Preview Text" button).
Sometimes you can take advantage of the font typography to get something different. In this case it was used a font with a specific outline to easily get some raising flames in fire text. The name of the used font is "Flame".

Here you see the result of the fire effect made with the above text.

Smoke

It's an interesting example of smoke text rendering.
You can get it by yourself in [Procedural Text Effects] / [Dirt and Pollution] / [Smoke].

Here you see the original text used as input (caught by the "Preview Text" button).
The input text "tells" the effect generator how the result should look like. In this example, it was possible to create a very interesting fade up appearance just by taking advantage of the font face features. This kind of "hole" in the letters top was enough to get this. This font is "Amped For Evil".

This is the result of the smoke effect when applied over the above text.

Metal

This is a good example of metal text effect.
You can get it by yourself in [Procedural Text Effects] / [Metal] / [Brute Metal 2].

Here you see the input text for the effect showed just below (generated using the "Preview Text" button). Nothing special about this font, except its letters have very well defined holes. It's interesting in this case, because sometimes this effect tends to "ignore" small regions.

Here you see the result of the metal effect created having the above text as input.

If you prefer a more shiny metal, increase the image contrast after getting it. You can make it very easily with P2P using the Image Editor. In this case, it was used a contrast inprovement of 40%.