|Range|Description|
|-----|-----------|
|0..4095|Tiles|
|4096..8191|Walls|
|8192..8447|Wires|
|8448..32767|Items (static)|
|32768..0x0FFF_FFFF|Items (dynamic\*)|
|0x1000_0000..0x7FFF_FFFF|Actors|
|-2147483648..-1 (all negative numbers)|Faction|

* dynamic items can have their own properties that will persist through savegame.

Actors range in-depth

|Range|Description|
|-----|-----------|
|0x1000_0000..0x1FFF_FFFF|Rendered behind (e.g. tapestries)
|0x2000_0000..0x5FFF_FFFF|Regular actors (e.g. almost all of them)
|0x6000_0000..0x6FFF_FFFF|Special (e.g. weapon swung, bullets, dropped item, particles)
|0x7000_0000..0x7FFF_FFFF|Rendered front (e.g. fake tile)