* This value is compared against the '''actual 3D distance''' between the dioptra user and the helper, converted to tiles (meters / 4).
* Height difference affects the distance. The game uses full 3D distance (via Creature.rangeTo), so vertical differences (terrain height or floor levels) increase the effective distance. This means a large height gap can cause the measurement to fail even with good tools. (effectively this is a Pythagorean distance: √(dx² + dy² + dz²).)
* If '''maxTiles < distanceInTiles''', the measurement fails. Its almost impossible to stand on the tile borders its best to add 1-2 quality.
min((dioptra max range) , (range pole max range))
* Fine positioning inside a tile affects measurement. '''Creature.rangeTo''' uses the creature’s precise world position, not just tile coordinates. Standing slightly closer to the border reduces the distance and can make the measurement succeed at the threshold. To maximize measurement range, stand as close as possible to the tile edge facing the other endpoint.
* These limitations affect only measurement, not bridge length. Dioptra and pole range determine whether the survey can be performed. They do not limit actual bridge construction length — the real bridge length is restricted only by bridge-building rules (span limits, slope limits, section types, etc.).
== Additional Notes ==
[[Category:Bridges]]
[[Category:Cartography]]
[[Category:Babel/D]]