Yes, You need something called ToriPrime to even have pictures in your Signature.

It's 10$USD/year

Features are as followed:
Pictures in Sig.
Hidden section only people with ToriPrime can see.
Unlimited letters in sig.
Change your title. Ex Senior Member to I like Pie, Or anyting you want.

I'm sure there is more uses, I just can't think of them right now.

y must i have prime i can have my guy from the regular one, itdoesnt matter to me

wait... are u meaning that u want to hav it as ur signiture? because you need to buy a toriprime if that is the case

I do believe he means avatar. And also, to answer your question, you have to paste your avatar onto a transparent background, than erase the white background he is against.....unless you have shaders >.> than youll need to remove the shaded background, which will suck.