I went with an organic blood spatter to contrast with the too-perfect vector lines.
These are actually vectors based on Trigun's original comic art by Yasuhiro Nightow. It was a touching illustration of the two leading characters, sitting on a couch after one of them, erm, no spoilers! Sorry!
I saw that scene in the book and got so sad I stopped buying the book D: then I was too poor to continue buying the comics, but I want to collect them all one day. Just...give me a minute...*bawls*