Changes

* Maximum measurable distance is based on item quality.The dioptra’s effective range is calculated as: maxTiles = QL * 0.4 + rarity

The dioptra’s effective range * This value is calculated as: compared against the '''maxTiles = QL * 0.4 + rarityactual 3D distance'''between the dioptra user and the helper, converted to tiles (meters / 4).

This value is compared against * Height difference affects the actual distance. The game uses full 3D distance between (via Creature.rangeTo), so vertical differences (terrain height or floor levels) increase the dioptra user and effective distance. This means a large height gap can cause the target, converted measurement to tiles fail even with good tools. (meters / 4effectively 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.

Its almost impossible * The [[range pole]] uses the same formula. The pole has its own independent range check using the same calculation. Both tools must succeed, so the effective maximum distance is the smaller of (including rarity factor):  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 on as close as possible to the tile borders its best to add 1edge 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-2 qualitybuilding rules (span limits, slope limits, section types, etc.).