Terrablox

A 3D voxel virtual tabletop

Terrablox is a virtual tabletop (VTT) built from the ground up in 3D. Build your map out of blocks, drop in tokens for the party and the monsters, and run your session with real line of sight, real lighting, and real fog of war. Terrablox has no rules or content of its own: you bring your own game, in any genre, at any scale.

Built in 3D from the ground up

In Terrablox the map is a true 3D world, and everything else follows from that: stairs, balconies, bridges, caves, towers and multi-floor buildings all work naturally, and sight, light, sound and rulers all respect real geometry.

• Real 3D lighting. Light is propagated through the voxel grid: a directional sun, ambient skylight, colored light, and any block can be turned into a light source (torches, lava, crystals, neon signs, screens). Tokens can carry their own lights.

• Per-scene look. Choose between normal, soft or hard cel shading, blueprint and "moonside" outline styles, plus sky, sun, horizon and ground colors, exposure, contrast, saturation, and atmospheric fog.

• Multiple cameras. Free orbit, orthographic, true isometric (with rotation snaps and several pitch presets), top-down, and first-person from any token's eyes.

• Cut plane. Slice away everything above a chosen height to see inside buildings and dungeons.

Line of sight and fog of war that actually work

Because the world is real 3D geometry, visibility "just works". A tall wall hides what is behind it. A token on a cliff sees farther. A closed door prop blocks sight until someone opens it.

• Three visibility states per team: Unexplored, Explored (remembered) and Visible. Choose per scene how dark unexplored and occluded areas should be (none, partial or full fog), and whether tokens may move only into visible areas, into explored areas, or anywhere.

• Per-token vision. Every token has its own eye height and vision radius, and can be flagged as an observer that contributes sight to its team.

• Team-based vision. Share one party-wide view, give every player private vision, or run PvP wargames and skirmishes with several teams that each track their own exploration.

• Fine-grained per-player permissions. For every connected player the GM decides, team by team, whose vision they can see through and which tokens they are allowed to move. Seeing and controlling are separate: a player can watch a scout's vision without being able to move the scout, or control a familiar without sharing its senses. Players can belong to any combination of teams.

• GM override. Flip between the GM view and the player view to check exactly what the table can see.

• Manual fog control. Reveal or hide rectangles of the map by hand, optionally clipped to a selection for clean room-by-room reveals, or reveal/hide everything in one click.

• Hidden tokens. The GM can hide any token from the players entirely, for ambushes and surprises.

• Turn tracker. Run initiative-based play per token or per team, or stay in free real-time mode. In turn-based mode tokens can only move on their own turn.

Fast, thoughtful building and painting

Building is like drawing pixels, but in 3D, and the tools are designed so you can block out a whole encounter in minutes and still refine it later.

• Shape brushes. Single block, line, rectangle, ellipse, sphere, hill/dome, cone, pyramid, ramp, roof and arch. Shapes show live width x depth x height dimensions while you drag.

• Outline plus fill. Every shape draws an outline in your primary color and fills in your secondary color. Set the fill to nothing for a true hollow shell, or use stipple mode to randomly dither between two colors for rough terrain and scatter.

• Snap to surface. Draw down onto terrain from open air, or dig up through solid ground, so strokes follow hills and caves.

• Freehand pencil with square or circular brushes, flood fill, eyedropper, adjustable layers and width, and an overwrite toggle.

• Build plane. A floating grid for placing blocks in mid-air, as a floor, or as a north-south or east-west wall.

• Paint mode recolors existing blocks without changing their shape, so you can restyle a finished map.

• Palettes. 16 color slots plus a full color picker, with stock and custom palettes you can save, import and share. Blocks can be transparent, light-emitting, or non-solid.

• Select, copy and paste. Select any 3D volume and copy it as plain text you can paste into a forum post or your notes. Paste with a live ghost preview that you can rotate, tip, mirror and scale before stamping.

• Prefab library. Save slabs to a searchable, folder-organized library, and ship with a starter collection of furniture, nature, modern and grimdark sci-fi pieces.

• Props. Turn any chunk of blocks into a movable object for furniture, vehicles and doors. Give a prop a second position and rotation and it becomes an animated door, drawbridge or elevator that tokens riding on it travel with. Per-prop permissions let players open the door without letting them drag the wall.

• Import. Bring in MagicaVoxel (.vox) files, or reference images (with optional heightmaps) as overlays to trace over or convert into blocks.

• Export. Render the scene to a PNG, top-down or from any of four isometric angles, to share maps or print handouts.

Any genre, any scale, any art style

Blocks are abstract. One cube can be a foot, a meter, ten feet, or a mile, and rulers use whatever units you set per scene. The same tools build a tavern, a starship corridor, a neon city street, a hex-crawl wilderness, a mecha battlefield or a modern-day heist. Terrablox imposes no setting, no rules system, no required asset kit and no art style.

Tokens: any image, any size, any game

Tokens are simple 2D standees that stand upright in your 3D world, so a non-artist can set up a character in seconds. Use pixel art, painted illustrations, photos or anything else.

• Import any image as a token, with a library of bundled characters to start from. Standees can be tinted to team colors for quick recoloring.

• Any footprint. Round, square, hex, triangle, capsule or rectangular bases of any size, so dragons, wagons and swarms all fit.

• Facing and multi-angle sprites. Optional facing, with sprite sheets of 2, 4 or 8 sides that swap as the token turns.

• Top-down mode draws a token as a flat image, for tanks, ships and vehicles.

• Flying tokens with adjustable altitude and a drop line to the ground.

• Custom stat templates. Define your own fields (HP, AC, sanity, fuel, anything) with min, max, step, number, bar, percent or yes/no display, and set who can see or edit each one. Stats show above tokens, with quick +/- buttons.

• Conditions and notes, with public and GM-only notes per token.

• Unique characters. Promote a token to a campaign-wide character whose stats follow it across every scene, stored as a plain markdown file.

• Token library. Save tokens as reusable presets and paste them into any scene in any campaign.

• Teleport, group move and group rotate. Select several tokens and drag them in formation, or jump a token across the map with a preview.

The details that make a session run smoothly

• Ride slots and mounts. Give any token or prop named seats with offsets and facings. Riders move with the vehicle, can be locked in place (a tank turret that rotates but cannot dismount), and several riders can share one mount: horses, wagons, ships, mechs.

• Rulers that understand terrain. Movement rulers follow the ground, climbing slopes and short walls and reporting true path distance and height change; flying rulers measure straight lines; plus sphere and cone templates, waypoints, secret rulers for the GM, and lockable persistence.

• Chat and dice. OOC and IC chat tabs, whispers to a player, team, token owner or just the GM, and a Roll20-style dice roller (NdX, exploding, keep/drop, reroll, parentheses, math) with secret rolls.

• Notes you own. Campaign and scene notes are plaintext markdown files with wikilinks and per-team read/write permissions, and the folder opens directly as an Obsidian vault.

• Markers. Pin labeled markers to the map, optionally team-visible, with attached notes.

• Audio. Spatial sound emitters placed in the world that fade with distance and are muffled by walls, layered ambient sound, a stock sound library, and import for your own audio.

• Multiple scenes per campaign with instant switching and autosave.

• Customizable interface. Remap nearly every interface and tool color (including for color-blind accessibility), and scale text globally or independently per area: tools, chat, notifications, token names and more.

• Rebindable camera controls with mouse and keyboard inversion and swappable pan/orbit buttons.

• Spectator monitor. A GM-only second window with its own free camera, for a second screen or a table display.

• Camera lock. Lock players to a fixed view for guided reveals and cutscenes.

• Text-based data. Slabs, tokens, templates and notes are plain text, so they can be diffed, shared by copy-paste and edited in any text editor.

Play together, with no server to set up

Multiplayer is peer-to-peer and GM-authoritative: the GM hosts, players join directly over LAN or online through Steam. Everything in the session stays in sync: blocks, tokens, fog, lighting, props, markers, audio, chat and notes. Players joining mid-session receive the full world automatically.

Terrablox is also fully playable offline. There is no subscription and no account to create, and your campaigns live on your own computer as plain files.

Feature list

• Full 3D voxel world with directional sun, skylight, colored emissive blocks and token lights

• 3D line of sight and 3-state fog of war, tracked per team

• Per-player, per-team permissions for what each player can see and what they can move

• Shape, pencil, fill, stipple and snap-to-surface building tools, plus a paint mode and build plane

• Copy/paste and a prefab library using shareable plain-text slabs, rotate/flip/scale on paste

• Props with optional animation, for doors, drawbridges, elevators and vehicles

• MagicaVoxel and reference image import, scene image export

• Custom tokens from any image, with any footprint, facing, flying, top-down mode and ride slots

• Custom token stat templates, conditions, notes, unique characters and a token library

• Turn tracker for initiative or real-time play

• Dice roller, OOC and IC chat, whispers and secret rolls

• Terrain-aware rulers with sphere and cone templates

• Customizable units, so a block can be a foot, a meter or a mile

• Perspective, orthographic, isometric, top-down and first-person cameras

• Several render styles including cel shading and blueprint, weather fog and a customizable sky

• Spatial audio emitters and a stock sound library

• Markdown notes that double as an Obsidian vault

• Customizable interface colors and text sizes

• LAN and Steam multiplayer, with offline play always available

• A starter library of stock prefabs (furniture, nature, modern, grimdark sci-fi) and character images