Its a grunge sig,so get some grunge brushes.
The outcome is this:
first off you need a render.
Once you get the render,all you need to do is find the main colours.
Dont worry if the sig is only one colour,that happend to me,and i fixed it allitle
This sig doesnt use lighting asmuch as other sigs,so uhh you will have to put lighting in yourself.(I didnt because i used ganondorf,it wouldnt look good with lighting)
Steps:
1.Splatter some different grunge brushes around,leaving some white spaces,and one solid black space.
2.now to add colour.This is why you need to have white space.Go to Colour>Colour>Colourize.
Make the sig the main colour of your render.On this step you can add c4ds if you want.
3.Motion blur it untill satisfied.
4.Now,You must add more brushes.
5.Colour them again.
6.Motion blur again
7.Create a new layer with the render on it.
8.Merge layer.
9.Smudge with grunge and circle brushes,and smudge near the render for blending.
10.Colour it slightly(just like uhh take away 1 from lighting for darkness)
11.Add size 18 text under the solid black.
12.Smudge with grunge brush.
13.Merge layers and then smudge text till you can barely see it(like mine)
