Truthfully its not a good effect to use in a signature unless your a beginner(not sure if you are dont remember srry
)....
Effects:
-No depth... it should not be a bland 1 dimensional background no matter how abstract...
-Bland
-Just not good in a sig...
Tips on the sig(I know you want the effects shit but fuck that...) :
-Don't make background B/W with an original color render on front
-Saying that try to add photo effects/grad maps...