Thats just a pattern fill or something with a shallow degree of density. Use a picture mate lol its the easiest way. Take my sig that i did for sparky - save it. Open it up use that text you have there and place the carbon fibre area above it and do this - (this is from memory i dont have Photoshop installed at the mo) Select the text layer and duplicate it, turn the oringinal one off. just incase Then press ctrl and click that text layer. - This will have that antline thing around the text area. then go to 'select' and click inverse. and hit delete. A bit of dodgy tutorial but that should leave you twith the inside area as carbon fibre... and if you change the image size of my sig before hand you can adjust the density of the effect.