voxid

hello, I have a problem with a strange shadow that forms with my model only for proxy.

hi, i have a problem with my model in game . When I'm at the back of the helicopter my model disappears , I do not know why?In OB the model does not exceed the grid area.

only when i'm view from behind and i have 2 lod (0 and 1001)

its still not working ...

when I just put a color code I have the same problem

when I removed the rvmat I still have the same problem

thank you for your help but the problem does not come from there