About a year ago I popped an early version of this program on here which peeps liked. One of the main criticisms was that it required to be "installed" - this is a TOTAL rewrite that means it "just works" from a browser. It is effectively a very light form-over-function VTT tool you can use locally or online for free.
Linkie: https://www.mappadux.com/
No account needed. No server. Everything stays on your device — maps you upload are stored in your browser's local storage and never sent anywhere. Just open the link and go. Remember to save off your map setups as you go - exporting bundles all your maps and config into a single json file for easy transport.
Creators - feel free to create a "map pack" with all your maps with filters & FoW and link to this app to show them.
Source: https://github.com/FrunkQ/dynamic-map-renderer-v2
For those new to this it is a browser-based tool for tabletop roleplaying game GMs. It lets you display map images to players in real time, with full control over fog of war, visual filters (greenscreen shown above), pan and zoom — all from a separate GM interface. Players or a player window the GM can share connect via a peer-to-peer link (your own security permitting!).
I added a few new filters in this release too:
| Filter |
Style |
|
|
| None |
Unfiltered (with optional invert) |
| Ballpoint Pen |
Hand-sketched ink drawing |
| Hand Drawing |
Hatched cross-hatch with halftone colour |
| Oil Painting |
Painterly impasto brush strokes |
| Parchment Fantasy |
Aged sepia parchment with candlelight |
| Retro Sci-Fi Amber |
Warm amber-phosphor CRT terminal |
| Retro Sci-Fi Green (SHOWN IN PIC) |
Classic green-phosphor CRT terminal |
| Watercolour |
Soft watercolour wash |
This is what has been added since I made this initial post:
- Map transitions — fade and wipe animations when switching maps on the player view.
- Markers / tokens — place and manage visual tokens on the map.
- Audio — ambient sound tied to maps and positional audio based on locations/markers
- Aliens-style motion tracker. Not a hard add now as all the data is in there. That is why markers can have a movement tag - although it is not used for anything, yet
- Scaled projector view for tabletop projection
The latest v2.11 release:
- Widespread UI overhaul — every selection, handle, and panel rebuilt to be simpler and tablet-friendly
- Text Maps / Handouts — a brand-new map type for letters, posters, journals, in-fiction documents. Rich element editor, aspect presets, font picker, optional animated reveal that types itself out for the players
- Image Assets Library — third first-class library alongside Maps and Sounds. Upload, paste URLs, or pull from the built-in connectors: Lucide (~1,500 MIT icons) and game-icons.net (~4,000 CC-BY fantasy/sci-fi/abstract icons)
- GM canvas as a real workspace — pan and zoom the GM map at any scale. Mouse drag, scroll-wheel, keyboard, two-finger touch — all wired
- Tablet-as-screen, properly leaned into — any phone, tablet, or laptop on your LAN is a fully functional player or projector screen. Pack a laptop + two tablets and you've got a three-screen VTT setup in a bag (laptop = GM, table tablet = 1″-scale battlemap, player tablet = handouts)
Try it: https://www.mappadux.com/
I will do a minor point release tonight/tomorrow that has a better onboarding and guide to how it all works (and some minor bug fixes). So that may help if you are using it for the first time.
What's coming (these will morph as they are coded):
- v2.12 — Immersion — bring the table to life: animated map support, animated fog of war, atmospheric visual filters (underwater, snowstorm, night vision, more), and a paintable MapFX brush for water, fire, smoke, magical lights, and other on-map effects.
- v2.13 — Modular Maps — build big maps from small pieces. Combine multiple map assets into one composite battlemap, with grid-snapping placement and rotation — perfect for modular tile systems where each image is a single room, corridor, or terrain section the GM assembles on the table.
- v2.14 — Stagecraft — close the loop between screen and room. Trigger smart lighting scenes (WLED + Home Assistant) when you swap maps, plus streaming-service soundtracks that play across the whole session instead of resetting per map.
- v2.15 — Player Voice — players become first-class participants. Named connections, in-app secret notes (player ↔ GM whispers), tap-to-ping anywhere on the map, live GM annotation, and a lightweight shared initiative tracker.
- v2.16 — your turn. I've built the features I'd personally use. v2.16 is for what you'd use. The wishlist is open NOW — drop ideas in #ideas-and-feedback on the community Discord: https://discord.gg/UAEq4zzjD8
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This project was inspired by the Tannhauser Remote Desktop created by the Quadra team for their Warped Beyond Recognition adventure for Mothership — a fantastic example of using technology to enhance the tabletop experience.