Planet fields determine how many building levels can exist on an object. In the current logic every completed building level and every queued level of that building counts as one used field. A level 20 Metal Mine therefore uses 20 fields.
How are used fields calculated?
The server iterates over all building types and sums current level + queued levels. This prevents several queued upgrades from all trying to consume the final free field. When used fields reach the effective limit, normal buildings can no longer be added to the queue.
Where does the maximum field count come from?
A new planet rolls its base limit from the position 1–15 table and then applies the universe planet-size multiplier. Additional effects can raise the effective limit. The Terraforming Resort adds 5 effective fields per level on planets.
How does the Terraformer work?
The Terraformer is exempt from the normal full-planet block, so it can be built even when every field is occupied. Each completed level increases the planet’s base field limit by 5. On a moon, the Lunar Base performs the equivalent role and also adds 5 fields per level.
Can a Terraformer or Lunar Base be demolished?
Yes, but the server checks whether the remaining buildings would still fit after losing 5 fields. If demolition would leave more used fields than the new maximum, the action is blocked.
FAQ — planet fields
Do ships or defenses consume planet fields?
No. Building levels create field usage. Fleet, defense and research do not consume building fields.
Does a queued building level already use a field?
Yes. Queued levels are included in used fields before they finish.
Example of field planning
If a planet has 204 fields and 180 are already used, 24 remain free. Adding five further building levels to the queue raises used space to 185 even before those levels finish, so queue planning matters. Terraformer 3 adds 15 base fields, while Terraforming Resort 4 adds 20 effective planet fields. When demolishing a Terraformer, the server checks whether removing its five fields would leave the planet with more used fields than its new maximum.
Related FAQ: Which planet positions 1–15 are best? · Planet or moon – what are the differences? · How does colonizing a new planet work?
How should the values in this FAQ be read?
The formulas and limits above describe the current Inter-War logic in the audited code. Some values are configurable per universe, so an administrator can change a multiplier without changing the underlying mechanic. If the live game panel shows a different configurable value, treat the active universe value as authoritative.
What should be checked in practice?
Before making a decision, check current building and research levels, active bonuses, universe parameters and validation messages. Inter-War often combines several layers: the base formula, server speed, Resorts, Officers, Avatar bonuses, Premium and temporary events. The server always performs the final calculation.