2.8 issue

Hi, I've got an issue in blender 2.8 ! I'm working on a small project, that worked fine, but since I tried enabling (and then disabled because it didn't work) Camera / Distance Culling (or I think it's the issue), my render is rendering fine until the end, when puf it disappear. Alpha, and other passes are still there, but the "Image" Output in render layers is just black with alpha at 0. Enabling / disabling use nodes in composition doesn't work.

(So I've switched back to 2.79, it works, but I definetly prefer 2.8 ^^ )

Oh, and another matter, if it could be possible to bring back materil override !