I think this guy was one of my favorite bloody snow figures from the Red Box Games archer set that I painted a while back. I did four WIP articles on this group, and the final episode covered the blood/poison effects, as well as how I tried to make it appear as if the blood was sinking into the snow.
That was the most fun part of the painting process, figuring out how to do that on a completely solid surface. Normally, I would have used more of a flock material which would have absorbed the paint naturally. This was a real challenge, but unavoidable since I had to continue with the same style of basing as the rest of the army.
Here's a link to that part of the step by step:
I also created a video for blood spatter and other effects, called (not surprisingly) Bloody Mess!
This and much of the rest of the Painting Pyramid series is available from me on USB drives, and also here: