Snapmap+
For DOOM (2016) SnapMap

The SnapMap editor, unchained.

Edit every property the engine knows. Bypass the stock editor's size, name, and palette limits. Place entities SnapMap was never built to expose. Your maps stay fully playable for everyone — console players included, nothing to install on their end.

↓ Download snapmap-plus.exe Read the guide

latest releaseBeta · Windows · free & open source (MIT) · self-updating — download once

PLAYER OUTPUT · ON SPAWNED SNAPMAP+ ACTION · UNLOCK EVERY PROPERTY PLACE ANYTHING NO LIMITS
The Snapmap+ window next to the DOOM SnapMap editor
Snapmap+ running alongside the SnapMap editor — live entity list, full decl editing.

What it opens up

Snapmap+ reads and writes the map data itself instead of going through the stock editor's menus — so the editor's guardrails simply don't apply.

See every property. Edit every property.

Entities carry far more fields than SnapMap's Properties menu shows. Snapmap+ puts the whole definition in front of you — and name-length caps, max sizes, fixed texture and model pickers are UI limits, not engine rules. Scale past the max. Apply any material.

  • Syntax-colored editor with a live problem checker
  • Focus mode for long definitions
  • Reclass an entity into anything compatible
The Snapmap+ window: the map's full entity list beside a syntax-colored property editor
Every entity in the map, live — filter, select, edit.

Place what the palette never showed you.

The engine has entity types SnapMap's palette never exposed. Snapmap+ reveals them in a *Custom tab inside DOOM's own Create menu — you place them exactly the way you place everything else, and the game does the rest.

  • Hidden and campaign-only entities, drag-placeable
  • Ships in DOOM's native Create menu, not a bolt-on
  • Spawn any entity definition by name from the console
The *Custom palette tab inside DOOM's Create menu
The *Custom tab, right inside DOOM's own Create menu.

Direct your map like a stage play.

Timelines are the engine's most powerful scripting entity — multiple actions on multiple entities with staggered timing — and the stock editor barely lets you touch them. Snapmap+ gives them a dedicated visual editor with typed fields.

  • Sequence events across any entities, on the clock
  • Typed argument fields — no guessing at formats
  • Prefabs: save a rig once, paste it into any map, share it as a file
The Timelines tab editing entity events and eventcalls
The Timeline editor: entity events and eventcalls with typed fields.
Snapmap+ console — 29 commands · 10 cvars
> sh_spawn <entitydef> spawn any entity the engine knows, right at the player
> sh_target_any reveal the normally-hidden placeable decls in the palette
> bss / bsi / bsf bulk-set a property across every stacked entity at once
> sh_type idPlayer -v runtime class introspection — fields, offsets, enums
> sh_help every command and cvar, described in one place

Up and running in three steps

One small file. It installs, updates, and uninstalls itself — and restores vanilla exactly.

Download

Grab snapmap-plus.exe with the button above. It keeps itself and Snapmap+ up to date from then on.

Double-click it

The installer finds your DOOM 2016 install automatically, asks you to confirm, and places two files. Still have the original SnapHak in there? It cleans that out for you — your maps and prefabs carry over.

Open SnapMap

Launch DOOM, open a map in the SnapMap editor — the Snapmap+ window appears alongside the game. Alt+Tab over and start editing.

Heads-up: Snapmap+ currently targets the DOOM build from before the April 2024 patch — a one-time depot download puts you on it, and online map publishing still works. The install section of the guide walks through it.

In action

Click any screenshot to focus it.

Focus mode: the decl editor filling the window
Focus mode — distraction-free editing of a long decl.
The Entity State panel showing class, inherit, and display name fields
Entity State — class, inherit, and display name, editable live.
The Prefabs tab with saved entity groups organized in folders
Prefabs — save a group once, paste it anywhere, share it as a file.
Hidden placeable entities revealed in the SnapMap palette by sh_target_any
sh_target_any — the hidden half of the palette, revealed.

For the SnapMappers

SnapMap gave a generation of DOOM fans their first level editor. This is our thank-you note.

Snapmap+ is free, MIT-licensed, and built in the open as a recreation of the original SnapHak tool. It collects nothing automatically — and when something breaks, the ? button files a report straight from the tool, so fixes land fast.

Everything you build stays standard SnapMap: publish your maps online and anyone can play them — PC, PlayStation, or Xbox — with nothing to install.

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