Alrighty I'm going to give this a bash.
In trying to keep trendy and with everyone else it's cool to have a profile that reflects either yourself or your alias/favourite character.
So first up you need a base for a character and a height and width for your signature. For Instance lets go with Duke from G.I.Joe.
Now the signature size and width I've used is around the 600x400 mark but a good base is 500x500.
Next you need about 3 - 4 Images of the guy your doing. We'll Use. These.>
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