Xiombarg
Your problem is known and only occurs with D3D, please could you try OpenGL driver instead ?
The issue is : https://bitbucket.org/ryzom/ryzomcore/issues/160/wind-tree-vp-not -working-correcly-under
Switching to OpenGL driver solved this problem for me on my Windows 7 64-Bit pc running the 3.0.0.7552 Steam Client!
Thanks Xamoion