Does anyone know of any free still poses/ animated poses or bvh files that could be used to create a snowball fight image? I've been trying out that fantastic snow shader that was posted in one of the threads here. It looks great rendered in Poser 8 IDL!

It does!  Show us a render.  Haven't seen any such poses around but try www.whatever3d.com to see if any does exist.

Top: Angelina Snowlie (I know, I was a bit drunk at the time and thought it was funny). BB's envirosphere with an equirectangular image I found as texture. IDL + 1 infinite light. Snow mat applied to V4.
The hair looks rubbish because if it was snow it would be solid not thin like that.

Right: Snow mat applied to Toon Penguin. BB's envirosphere again, this time with a gradient applied as the texture. IDL + 1 infinite light. This time I moved the light further back. so that the snow wasn't made too bright.

Bottom Left: Exactly the same setup as the Penguin but with 3DU's Pocket Pets Kitty plonked on the snow, without snow shaders applied to him. Because I just got him today.

Checked out the link you suggested but couldn't find any free ones that would do. Will probably look for some that have a similar stance and work from there.

Look for baseball throwing BVH, and then fight fall down BVH.  That would be fine for throwing the ball and then falling down when a ball hits.

The only snowball-specific motions of which I'm aware were by Red Eye Studio, released almost exactly six years ago, but I don't know if they're still available.

While playing around with some of the motions from their package, I produced this animation:

http://www.youtube.com/watch?v=lh9uuLw7jVk

http://blip.tv/file/715464

Quote - I've been trying out that fantastic snow shader that was posted in one of the threads here. It looks great rendered in Poser 8 IDL!

Can you post a link to the snow shader??

Never mind - I found it! :)