Hello, I have a problem with my foliage. I applied an opacity and the material works but when I move the camera, my plane disappears at times. Is it a problem with the camera? Thank you.
Most likely you are navigating behind the plane and by default the back side is culled. To disable that behavior, which makes sense for billboards/foliage set Culling to none on your material:
Ok thanks and where is this settings?
Select your material and you will find it at the last panel named Other in the inspector window (to the right of your screen).
Thanks so much Leonidas