Engine v5.2.26

August 16, 2026

A patch in the Lume line.

what's new

Terrain edits now sync reliably in always-on worlds. Players who rejoin get the terrain exactly as it was edited — edits made by scripts or by players who have since left no longer silently vanish on rejoin. And freshly edited chunks rebuild ahead of background work, so digs and builds turn solid and visible faster even while the world is busy streaming.
Drawn textures (lava, water, animated art made by texture scripts) no longer vanish for a minute and a half when a crowd of players joins at once. The engine now recognizes that the stall was the join rush, not your texture script, and keeps retrying quickly instead of putting the script in time-out.
Destroying something now cleans up everything it generated. Roads, rails, fences and other spline-built objects leave no debris: destroying the root also removes the segments, posts, and collision pieces it spawned — including ones orphaned by an old destroy. If your world already has stranded leftovers, one destroy of the old root id (or one destroyObjects sweep) clears hundreds of them; no room restart needed.
Every light in your world now shows its marker in god mode — including lights nested inside other objects and lights buried in walls. Markers draw through geometry and you can click them through walls to select and edit the light. No more invisible, uneditable lights.
Performance health readouts now tell the whole truth on small screens: when the engine holds your game at native resolution because a lower render scale wouldn't actually help, the report says so in plain words — and the auto-quality tuner stops wasting time on resolution cuts that change nothing, reaching the settings that DO help faster.
Always-on worlds stop restarting under load. A busy world working hard no longer gets mistaken for a dead one and restarted — the multi-minute freezes that hit heavy worlds over and over are gone. And when a world genuinely IS overloaded, Savi's tools now say so plainly instead of failing with mystery errors.
Textures that get stuck as flat placeholder colors (the pink-blocks look) now heal themselves: the engine quietly retries every few minutes until the real texture arrives, and flipping to another tab and back still kicks an immediate retry. No more refreshing the page to get your textures back after a flaky connection at load.
Games can take photos now! window.spawn.view.captureFrame() in your game UI hands your script a snapshot of that player's own view — build safari cameras, photo quests, postcard booths. Each player can only photograph their own screen, the shot is pure game world (no menus or chat in the frame), and nothing is saved or shared unless your script chooses to upload it.
Uploading a model with shape keys (morph targets — blinking faces, facial expressions) now tells you plainly what happened: one clear warning says the engine doesn't support shape keys yet and skipped them, and the rest of the model loaded fine. No more models silently arriving with frozen faces — and no more parser jargon drowning out the warnings that matter.
Multiplayer worlds get their animations back. Since 5.2.18, animations authored in a multiplayer world were never actually saved to the world's animation library — other players saw characters frozen in place (one world had 129 rigged characters stuck like statues). Authored animation clips now save and reach every player, and existing worlds heal on their own: the next time an animation plays, the library mints and everyone sees the motion.
Leftover Savi todo-marker debris cleans itself up. Worlds that collected stray marker cubes from long-gone todo notes (one world was carrying over 2,000) get swept automatically — and the sweep sticks in always-on worlds instead of the shards creeping back on your next visit.
Invisible-wall checks now match where walls are actually drawn. Occupancy probes against uploaded and conjured meshes (cave shells, sculpted walls) used to test a ghost box at the object's origin instead of where the geometry really sits — the drawn wall read empty while the empty ground at its feet read blocked. Cave and mesh interiors now answer occupancy correctly, so scripted barriers and "is this spot solid?" logic agree with what players actually see.
Looping sounds now register in always-on worlds — Savi's audio tools can see and stop them again. In multiplayer rooms, started loops were never recorded: "what's playing?" answered nothing, stray loops couldn't be hunted down and stopped, and players who joined late had no record of the ambience already running. Loops now register for everyone in the room, late joiners included.
Discord links in game UI now work in every spelling. A plain HTML link (<a href="https://discord.gg/…">) now asks the player to confirm and opens Discord in a new tab, exactly like openLink(...) and window.open(...) — and a link to a non-partner site tells you why it can't open (in your logs) instead of doing nothing.
Steep-slope climbing, sliding, and ground-snap are now yours to tune — skate parks and parkour walls just became authorable. On any physics: { body: "character" } object: maxSlopeClimbAngle: 70 (degrees) walks up steep quarter-pipes, snapToGroundDistance: 1.2 hugs snowboard downhills (or false to launch off ramp lips), minSlopeSlideAngle makes too-steep ground slide you downhill, and characterMass sets how hard you shove crates.
Rejoining an edited world can't serve you stale terrain anymore. A rejoin (always-on worlds, long-lived sessions) now rebuilds exactly the chunks that really changed — no more terrain that looks like it forgot the last session's edits until something else forces a rebuild.
Passengers and vehicle parts no longer drift apart for other players. Parts spawned by a vehicle (lights, turrets, seats) used to slide away from it — unboundedly, and the drift stuck — on everyone else's screen when some players drove. Now the whole vehicle stays together on every screen, whoever drives it.
A graphics-driver crash can't blind Savi for an hour anymore. When the GPU device dies, her screenshots and view tools now answer plainly — "the renderer is restarting; your content didn't cause this" — instead of surfacing raw driver errors, and her capture eye reboots itself on the very next look.
Debug dumps stop crying wolf about audio. The engine's planned network probes and cross-site audio fetches always LOOKED like failed requests in a dump ("[error] 0B" walls) even when your audio was working perfectly — Savi would investigate healthy sound as if it were broken. Those rows now say what they are ([probe], [opaque]) so real network errors stand out — and they never crowd real failures out of the dump.
Savi can now SEE which objects are solid when she looks — no more guessing why players fall through. When she identifies an object or frames it in a look, the answer says whether it actually collides right now (solid: static-mesh, solid: none, …), so a wall that only looks like a wall gets caught the moment anyone checks it instead of the moment a player falls through it.
Textures no longer flicker or swap after heavy editing sessions — a texture-cache cleanup racing the renderer could previously freeze the whole session with a "graphics driver hiccuped" error until reload.
Tile maps stop going blank mid-edit. If your tile world's generator script briefly breaks while you're editing (or hasn't finished loading), painted chunks now hold their last good art instead of flashing to flat empty slabs — and the engine tells you the generator is unavailable instead of staying silent. The moment the script heals, your pending edits fold right in.
Timers scheduled while a world is still starting up (runInTicks, runInSeconds, runSchedule) now fire once the world is running instead of silently disappearing — staged builds queued at startup no longer stall.
Voxel block textures stop getting stuck as flat white/pink. Rebuilt chunks no longer forget they're waiting on a texture (the "first block pink, second correct" bug), worlds with more than 64 block materials get all their textures instead of flat tint from material 65 on, and when a texture genuinely can't apply the engine now says why instead of silently painting white.
Voxel worlds stop going black when their generator script breaks. The same cure as for tile maps: if a voxel world's generator script briefly fails to compile, built terrain now HOLDS its last-good look (and hand-placed voxels keep rendering) instead of whole regions silently turning to permanent black nothing — the engine says the generator is unavailable, retries, and heals the moment the script recovers.
Recoloring voxel terrain is instant now. Changing a voxel material's color, texture, roughness, metalness, or emissive updates the world as a palette swap — no more full-world remesh (with its multi-second hitch and physics churn) for a cosmetic edit. Structural edits (solidity, collision, block shape) still rebuild what they must.
Joining an always-on world with terrain edits stops paying a growing tax. Every join used to quietly grow the world's edit history and force edited terrain to rebuild even when nothing changed — long-lived edited worlds got slower to join with every visit. Syncs are now a clean no-op when nothing changed, so joins stay fast no matter how many times the world has been synced.
Game photos come out the way you ask. window.spawn.view.captureFrame() still hands back a JPEG by default, but now captureFrame({ type: 'image/png' }) gives crisp pixel art with no compression, { maxSize: 4096 } keeps the full resolution, and { type: 'image/webp', quality: 0.6 } makes a small share-sized shot. Rapid double-clicks take two photos instead of dropping the second.
Savi stops learning object paths that only half-work. Reading an object by its list position used to succeed, so she'd keep using that number as a name — and then every edit or destroy aimed at it silently did nothing. Now the read itself tells her the object's real name the first time, so she talks about your objects the same way she changes them.
2d worlds stop developing permanent invisible holes — the picture always catches up to the world. A tile chunk that got lost on the way to your screen (or kept showing old art after a re-save) used to stay wrong until a reload; now the engine notices within seconds and repaints exactly the chunks that diverged. First loads that raced the terrain script no longer come up empty with no ground to stand on — the map fills in the moment the script is ready.
A model that failed to load because of a hiccup now says it will retry — renaming is never needed. When the server answers a failed download with its own retry window, Savi's scene view now reads "temporarily failed — retries on its own" instead of declaring the asset dead and regenerating it under a new name.
Falling through the world now puts you back instead of dropping forever — and your script can choose where. Heightmap worlds get an automatic floor far below the deepest terrain: anything that falls past it comes back at the spawn point. Tune it per place with worldBounds: { bottom: -140 } (any world kind, null for no floor at all), and take over the response by exporting onOutOfBounds(event, api) from the body's behavior — return false and the respawn is yours: last checkpoint, a damage penalty, a game over. Underground builds (terrain.underground: true) keep working exactly as deep as you build them; the net sits 64 m below the lowest terrain.

what's new

Terrain edits now sync reliably in always-on worlds. Players who rejoin get the terrain exactly as it was edited — edits made by scripts or by players who have since left no longer silently vanish on rejoin. And freshly edited chunks rebuild ahead of background work, so digs and builds turn solid and visible faster even while the world is busy streaming.
Drawn textures (lava, water, animated art made by texture scripts) no longer vanish for a minute and a half when a crowd of players joins at once. The engine now recognizes that the stall was the join rush, not your texture script, and keeps retrying quickly instead of putting the script in time-out.
Destroying something now cleans up everything it generated. Roads, rails, fences and other spline-built objects leave no debris: destroying the root also removes the segments, posts, and collision pieces it spawned — including ones orphaned by an old destroy. If your world already has stranded leftovers, one destroy of the old root id (or one destroyObjects sweep) clears hundreds of them; no room restart needed.
Every light in your world now shows its marker in god mode — including lights nested inside other objects and lights buried in walls. Markers draw through geometry and you can click them through walls to select and edit the light. No more invisible, uneditable lights.
Performance health readouts now tell the whole truth on small screens: when the engine holds your game at native resolution because a lower render scale wouldn't actually help, the report says so in plain words — and the auto-quality tuner stops wasting time on resolution cuts that change nothing, reaching the settings that DO help faster.
Always-on worlds stop restarting under load. A busy world working hard no longer gets mistaken for a dead one and restarted — the multi-minute freezes that hit heavy worlds over and over are gone. And when a world genuinely IS overloaded, Savi's tools now say so plainly instead of failing with mystery errors.
Textures that get stuck as flat placeholder colors (the pink-blocks look) now heal themselves: the engine quietly retries every few minutes until the real texture arrives, and flipping to another tab and back still kicks an immediate retry. No more refreshing the page to get your textures back after a flaky connection at load.
Games can take photos now! window.spawn.view.captureFrame() in your game UI hands your script a snapshot of that player's own view — build safari cameras, photo quests, postcard booths. Each player can only photograph their own screen, the shot is pure game world (no menus or chat in the frame), and nothing is saved or shared unless your script chooses to upload it.
Uploading a model with shape keys (morph targets — blinking faces, facial expressions) now tells you plainly what happened: one clear warning says the engine doesn't support shape keys yet and skipped them, and the rest of the model loaded fine. No more models silently arriving with frozen faces — and no more parser jargon drowning out the warnings that matter.
Multiplayer worlds get their animations back. Since 5.2.18, animations authored in a multiplayer world were never actually saved to the world's animation library — other players saw characters frozen in place (one world had 129 rigged characters stuck like statues). Authored animation clips now save and reach every player, and existing worlds heal on their own: the next time an animation plays, the library mints and everyone sees the motion.
Leftover Savi todo-marker debris cleans itself up. Worlds that collected stray marker cubes from long-gone todo notes (one world was carrying over 2,000) get swept automatically — and the sweep sticks in always-on worlds instead of the shards creeping back on your next visit.
Invisible-wall checks now match where walls are actually drawn. Occupancy probes against uploaded and conjured meshes (cave shells, sculpted walls) used to test a ghost box at the object's origin instead of where the geometry really sits — the drawn wall read empty while the empty ground at its feet read blocked. Cave and mesh interiors now answer occupancy correctly, so scripted barriers and "is this spot solid?" logic agree with what players actually see.
Looping sounds now register in always-on worlds — Savi's audio tools can see and stop them again. In multiplayer rooms, started loops were never recorded: "what's playing?" answered nothing, stray loops couldn't be hunted down and stopped, and players who joined late had no record of the ambience already running. Loops now register for everyone in the room, late joiners included.
Discord links in game UI now work in every spelling. A plain HTML link (<a href="https://discord.gg/…">) now asks the player to confirm and opens Discord in a new tab, exactly like openLink(...) and window.open(...) — and a link to a non-partner site tells you why it can't open (in your logs) instead of doing nothing.
Steep-slope climbing, sliding, and ground-snap are now yours to tune — skate parks and parkour walls just became authorable. On any physics: { body: "character" } object: maxSlopeClimbAngle: 70 (degrees) walks up steep quarter-pipes, snapToGroundDistance: 1.2 hugs snowboard downhills (or false to launch off ramp lips), minSlopeSlideAngle makes too-steep ground slide you downhill, and characterMass sets how hard you shove crates.
Rejoining an edited world can't serve you stale terrain anymore. A rejoin (always-on worlds, long-lived sessions) now rebuilds exactly the chunks that really changed — no more terrain that looks like it forgot the last session's edits until something else forces a rebuild.
Passengers and vehicle parts no longer drift apart for other players. Parts spawned by a vehicle (lights, turrets, seats) used to slide away from it — unboundedly, and the drift stuck — on everyone else's screen when some players drove. Now the whole vehicle stays together on every screen, whoever drives it.
A graphics-driver crash can't blind Savi for an hour anymore. When the GPU device dies, her screenshots and view tools now answer plainly — "the renderer is restarting; your content didn't cause this" — instead of surfacing raw driver errors, and her capture eye reboots itself on the very next look.
Debug dumps stop crying wolf about audio. The engine's planned network probes and cross-site audio fetches always LOOKED like failed requests in a dump ("[error] 0B" walls) even when your audio was working perfectly — Savi would investigate healthy sound as if it were broken. Those rows now say what they are ([probe], [opaque]) so real network errors stand out — and they never crowd real failures out of the dump.
Savi can now SEE which objects are solid when she looks — no more guessing why players fall through. When she identifies an object or frames it in a look, the answer says whether it actually collides right now (solid: static-mesh, solid: none, …), so a wall that only looks like a wall gets caught the moment anyone checks it instead of the moment a player falls through it.
Textures no longer flicker or swap after heavy editing sessions — a texture-cache cleanup racing the renderer could previously freeze the whole session with a "graphics driver hiccuped" error until reload.
Tile maps stop going blank mid-edit. If your tile world's generator script briefly breaks while you're editing (or hasn't finished loading), painted chunks now hold their last good art instead of flashing to flat empty slabs — and the engine tells you the generator is unavailable instead of staying silent. The moment the script heals, your pending edits fold right in.
Timers scheduled while a world is still starting up (runInTicks, runInSeconds, runSchedule) now fire once the world is running instead of silently disappearing — staged builds queued at startup no longer stall.
Voxel block textures stop getting stuck as flat white/pink. Rebuilt chunks no longer forget they're waiting on a texture (the "first block pink, second correct" bug), worlds with more than 64 block materials get all their textures instead of flat tint from material 65 on, and when a texture genuinely can't apply the engine now says why instead of silently painting white.
Voxel worlds stop going black when their generator script breaks. The same cure as for tile maps: if a voxel world's generator script briefly fails to compile, built terrain now HOLDS its last-good look (and hand-placed voxels keep rendering) instead of whole regions silently turning to permanent black nothing — the engine says the generator is unavailable, retries, and heals the moment the script recovers.
Recoloring voxel terrain is instant now. Changing a voxel material's color, texture, roughness, metalness, or emissive updates the world as a palette swap — no more full-world remesh (with its multi-second hitch and physics churn) for a cosmetic edit. Structural edits (solidity, collision, block shape) still rebuild what they must.
Joining an always-on world with terrain edits stops paying a growing tax. Every join used to quietly grow the world's edit history and force edited terrain to rebuild even when nothing changed — long-lived edited worlds got slower to join with every visit. Syncs are now a clean no-op when nothing changed, so joins stay fast no matter how many times the world has been synced.
Game photos come out the way you ask. window.spawn.view.captureFrame() still hands back a JPEG by default, but now captureFrame({ type: 'image/png' }) gives crisp pixel art with no compression, { maxSize: 4096 } keeps the full resolution, and { type: 'image/webp', quality: 0.6 } makes a small share-sized shot. Rapid double-clicks take two photos instead of dropping the second.
Savi stops learning object paths that only half-work. Reading an object by its list position used to succeed, so she'd keep using that number as a name — and then every edit or destroy aimed at it silently did nothing. Now the read itself tells her the object's real name the first time, so she talks about your objects the same way she changes them.
2d worlds stop developing permanent invisible holes — the picture always catches up to the world. A tile chunk that got lost on the way to your screen (or kept showing old art after a re-save) used to stay wrong until a reload; now the engine notices within seconds and repaints exactly the chunks that diverged. First loads that raced the terrain script no longer come up empty with no ground to stand on — the map fills in the moment the script is ready.
A model that failed to load because of a hiccup now says it will retry — renaming is never needed. When the server answers a failed download with its own retry window, Savi's scene view now reads "temporarily failed — retries on its own" instead of declaring the asset dead and regenerating it under a new name.
Falling through the world now puts you back instead of dropping forever — and your script can choose where. Heightmap worlds get an automatic floor far below the deepest terrain: anything that falls past it comes back at the spawn point. Tune it per place with worldBounds: { bottom: -140 } (any world kind, null for no floor at all), and take over the response by exporting onOutOfBounds(event, api) from the body's behavior — return false and the respawn is yours: last checkpoint, a damage penalty, a game over. Underground builds (terrain.underground: true) keep working exactly as deep as you build them; the net sits 64 m below the lowest terrain.