Unlike in 3d shooters, you have to take care of the fields which are used to position your actors in the game and moving them around. The fields have a size of 32x32 in topview. The actor is a bit smaller: 24x24. The walls of the house have to be created such, that the actors can walk trough doors and such. Walls should have a thickness of 4, to give the actor enough space. The orange highlighted space shows the size of an actor.
8 units equals one foot. Each field is thus 4 feet, approximately 1.3 metres.
From sideview one floor has a height of 64 units. The ground floor goes from 0-64 the second from 64-128 and so on. The lowest 4 units of each floor are used for the block the actors are standing on.
Some other notes
Keep in mind, that the very lowest level has to be above the 0 for the z-coordinate. Otherwise the pathfinding and collision detection can become confused.
The order you place your spawnpoints is the order of the actors in your dropship. This means the first soldier in your dropship spawns at the first spawnpoint you placed. The second soldier in your dropship spawns at the second spawnpoint you placed, and so on...
- The maximum height a soldier can shoot over when crouched is 32 units.