This is realy supid question. But how can I create some grid so I could snap objects to? Tilemap doesn’t work cause Hierachy switch to new object and grid disappear. I found some videos and threads where solution is scritping, but I don’t think this is a good way for performance.
Snapping using the Grid component (created with a Tilemap GameObject) works when the selection is on the Grid GameObject or a descendant of the Grid GameObject.
You can also use the snapping from the SceneView Grid, which can be controlled with the Control key and has settings under Edit/Snap Settings.
Alternatively, the ProGrids preview package might help with this as well?