When designing a city, I want to ensure that the buildings are aligned perfectly by moving them one tile at a time. Could you explain the best tools or settings to use to achieve precise building placement without misalignment?
If your allowing players to build, then its best to align to the build grid.
Sometimes props don’t move the way you want them to and snap into places you don’t want, in which case turn off Editor Cell Snap in World Settings.
the standard wall is 512 units wide and 384 units high.
I did create a spreadsheet of widths and height multiples of these numbers for reference.
eg floor heights 0, +/- 384, +/- 768, +/- 1152 etc etc
wall centres 0, 512, 1024, 1536, 2048 etc etc
i usually just set my grid snap to 128, 4 moves for a normal piece and 2 moves for a half piece along X/Y distance, and 3 moves for Z height.
To get a location for build grid in a new area, set the grid snap to 512, move the prop to 0,0 and then drag it back to where you want it
But this assumes the prop has a central pivot point, there may be some with corner pivot.
check the transforms of prefab pieces, they often have rotations that are not quite whole degrees and when moved, the locations become not quite right if your into precision and integers…like I am