Turns out the noise is a film-grain post effect and can be disabled completely. Tutorials are pretty limited. So far they haven't talked about any form of alignment or snapping objects onto other objects, so creations are all wiggly and shabby. They show a lovely bridge simply modelled from repeated blocks. Trying the same, it's nigh impossible to align everything nicely using the analogue rotation. Controls fairly awkward and are going to take quite a lot of getting used to thanks to multiple button combos. Motion control on the DS4 seems compulsory and there's lots of drift, and pressing the shoulder buttons causes your hands and thus the game object to move.