Hi, As the tittle says I'm stuck trying to find what its causing my model allowing the AO and Light rays of other objects pass though them... I've discarded the problem could be the .rvmat as I've copied another model into the same .P3D (an object which works well) and the object get the same problem so I'm wondering it's a config or .P3D related issue ... Some images can explain this better :D As you can see the Ambient Oclussion of the grass appear though the model... And related to the light rays happens the same thing, note that the Pods (which are all of them proxies) don't allow the light rays to pass though..