How to remove visual "plume"?

Okay, I was able to kinda reproduce this, but in a different way…It seems a renderer bug for me now.

Could you upload a basic project has the issue to dropbox?

What I’ve found so far, if the surface behind the character has a texture, then you can see the bug!

Also try to assign a default material without any textures, just a color, to all the meshes around, and see how it looks like.

-m