Room Classification data/rooms/rooms.json

Sale-price multiplierThe room's fValueModifier multiplies the base price of every installed CondOwner inside it when the ship's sale value is computed. It is not a stat boost, an atmosphere buff, or a passive resource — it's strictly a price multiplier on the contents.

• Blank ×1.0 — contents sell for their base price. No bonus, no penalty.
• LuxuryQuarters ×2.0 — every installed bed, bin, chair, and light in that room sells for twice its base price.
• Loose / uninstalled items are skipped: they're never added to the room's content list (AddToRoom requires IsInstalled), so they don't pick up the multiplier.
• Walls, floors, and other "props" CondOwners that satisfy the room's flood-fill but aren't installed equipment are also excluded for the same reason.
• The multiplier is the only thing the spec contributes to ship value — there's no flat bonus per room, just the per-item scaling.

So when you mod a new room with fValueModifier: 1.5, you're saying "anything installed in this layout is worth 50% more when the ship sells." Source: Room.cs:206 in the decompiled assembly.

That's the entire calculation (Ship.cs:8632). Two contributors: per-room contents multipliers (already inside RoomValue) and a flat ×3 bump for having any O2 pump. No variety bonus — the game does not count distinct room types or reward diversity directly. The "variety effect" is implicit: spreading installed items across specialized rooms means each item picks up a higher multiplier than it would in a single Blank box.

GetPartsValue() is a separate "strip for parts" number — Σ StatBasePrice × damage_state across all installed COs, no room multiplier. Used for piecemeal sale, not whole-ship sale. Derelicts use GetShipValue() wrapped by a break-in factor and a deterministic-random per-ship modifier.

Asymmetric handlingWalls and wall-mounted equipment are routed to rooms differently — and a wall-mounted item's use point, not its actual position, decides which room credits its value.

• Walls themselves contribute $0 to ship sale value. ItmWall1x1 is IsInstalled with StatBasePrice: 21, but its mapPoints array is empty. With no "use" point, both branches above fall through and the wall is never added to any room's aCos. Walls do show up in GetPartsValue() (which walks installed COs directly), but not in GetShipValue().
• Wall-mounted equipment is credited to the room its use point lands in. A heavy lift rotor (StatBasePrice: 56,774) sits on a wall tile, but its "use,0,-42" point lands on the interior floor tile a crew member would stand on. Whichever room contains that tile is the room that multiplies the rotor.
• This means use-point routing is a value lever. Same heavy lift rotor whose use-point lands in a Blank room: 56,774 × 1.0. Same rotor whose use-point lands inside a LuxuryQuarters' floor area: 56,774 × 2.0 = 113,548. The rotor doesn't move; only the interior layout around its interaction tile changes.
• Equipment with a use-point that lands on another wall tile is worth $0 in ship sale (the second return fires). External-only equipment with no path to an interior tile contributes only via GetPartsValue().

So the real maximization play isn't just "stuff a valuable item into LuxuryQuarters" — it's: lay the high-multiplier room out so its enclosed area swallows the interior interaction tiles of the highest-base-price wall-mounted equipment (engines, rotors, weapons, RCS thrusters), while still satisfying that room's reqs and forbids and not tripping a higher-priority spec.