Once you install ProGrids via the Package Manager, it instantly hinders camera movement in the scene view. While holding the the right mouse button and using WASD to move around the world, you can no longer strafe the camera right or move backwards. Unity Version 2018.1.0f2 ProGrids Version 3.0.1 - preview via Package Manager Reproduction New project, new scene. Flying the camera with right mouse + WASD works fine. Install ProGrids via Package Manager, restart Unity if ProGrids does not load after installing. Fly camera again, notice the behavior described above. I like the idea of packages. Every repo I have has a copy of ProBuilder, ProGrids, TextMeshPro, and the Post Processing stack. I can finally start making some of those repos public since I don't have to share code that's not mine. TextMesh Pro seems to be working just fine in its package iteration. I have not tried the Post Processing stack. ProBuilder and ProGrids are unfortunately having some issues.