Weird Block in close up shot using brushify

HI everyone
i need to render few shots in my environnement, and i am using brushify landscape material, but when i am trying to render the sots, i have a weird spawn of ugly rocky meshes in front of my camera, any idea why ?
i tryed whith both renders method(movie render queue and movie scene capture) but it still the same

what i am suppose to render :

what i get from the render :

i need my render in 4 days , any help is greatly appreciated :slight_smile: