Hi, i have a very annoying problem with my shadows.

For information, i'm using:

- 1 stationary spotlight
- moveable static mesh
- floor bsp -> Lightmap Resolution = 2
- light is builded

The problem:

A video says more than 10000000 words: http://i.gyazo.com/4c8f631ec7492b42c55db48c04e4217b.mp4


Its wierd, because this only happens with my own meshes. Any ideas what's causing this shadow draw issue?