Creating rhino skin style text effect

Start by typing your text. Right click the layer and rasterize the test.

Select polygon lasso tool and create random shaped edgy selection. Press Ctrl+Shift+J to cut paste the selection in new layers. Repeat the steps till you split the whole text in many layers. Offset each layer by a few pixels in random directions.

Select and merge all the layers. Double click the layer to open layer style window. Apply settings as shown.

From layer menu select layer style>>create layers. Select and merge all the resulting layers. Select dodge tool with settings shown. Apply strokes randomly over the text.
Select burn tool and apply strokes.
Keep applying both the tools alternately to get an effect as shown below.

Create random selection using lasso tool. Press Ctrl+J to copy paste the selection in new layer.

Double click the layer to open layer style window. Apply settings as shown.
Repeat the above mentioned steps for the other alphabets too.