Map Editor (Web-Mappy)

The classic editors — Mappy, Annihilator, Cavedog’s TAE — all work the same way: you don’t paint terrain tile by tile, you place ready-made sections (hills, coasts, rivers, cliffs) and fit them together. This page runs that workbench in your browser: pick a world, snap sections onto the flat base, and export a playable .tnt + .ota pair. Everything runs locally in your browser — nothing is uploaded.

Workbench

How it works

• Place sections — click a piece in the palette (it arms, blue frame), then click the map. Existing pieces can be dragged to move, right-click removes them (or select + Delete). Esc clears the selection. Mouse wheel zooms, dragging the empty base pans.
• Select, copy, cut, paste — the Select tool drags a frame over any tiles, including parts of already-placed sections. Ctrl+C copies the framed area (flattened), Ctrl+X cuts it out (the area returns to base ground), Ctrl+V pastes it — click to drop copies as often as you like.
• Pipette & paint — the Pipette picks a single tile from the map together with its heights; Paint then draws it on free ground with a brush of 1–9 tiles, and Fill free areas covers all ground not occupied by sections. Painted heights are exported, so picking a sea tile and filling the gaps turns them into real water between your islands.
• Seam fit — sections carry their heights baked in. The badge on each palette piece compares its edge contours against the pieces already placed at the hover position: fits = seams match within 3 height units (the same tolerance the Mappy-compatible section packs were built with), no fit = visible cliff at the seam.
• Flat base — the base height auto-snaps to the world’s standard flat level (each tileset has its own); adjust it if your sections disagree.
• Reload-safe — everything you build is autosaved in your browser (localStorage): after F5 the world reloads and your map comes back. For a permanent copy use Save layout; Clear map starts fresh.
• Export — .tnt (terrain: tile graphics, heights, minimap) and .ota (mission header with four start positions on the driest quadrant ground). Drop both into your TA directory or a map UFO. Save/load keeps the section layout as a small .webmappy.json for later editing.

Limits (current version)

• Terrain only — features (trees, rocks, wrecks) and unit start metal are not placeable yet; the exported map plays clean.
• Sections cannot be rotated or mirrored (the tile graphics are baked).
• One world per map — tilesets cannot be mixed (neither can the real editors’).

Sections © 1998 Cavedog Entertainment and the respective community tileset authors — see the Map Section Packs page for the full credits.