There was not picture of Prowl in movie style on the internet, the alt-modes are "tinkered" and the robot mode is the protoform out of some comic I found on google. This time I tried another type of bar than what I used so far (if I used it...) and I found it pretty good too.
Then, by this time, I have caught Shadows attention and he asked me to make a signature for his character.
The two are pretty similar and their only differences are the backgrounds on the right. I was unsure which one to take, I liked both and so I left the choice to Shadow. I strictly returned to my old bar-style. Later on I created a signature for Shadows secondary character.
At the beginning I had no clue what to use as a background, this one is actually improvized but I really like it myself.