Known issues (tester build 0.7)

Thanks for testing. These are the problems we know about in this build, with a way round each one, so you don’t have to report them again (but do tell us if one hurts you). If you hit something that isn’t here, use Help > Report a bug… and tell us roughly what time it happened.

Signing in and the launcher

• Signing in needs an invite. The launcher signs you in through your browser: use the email address your invite was sent to. Another address is refused, and the launcher says why. No invite yet? Request access on the sign-in screen asks for one. Installed with the offline installer? It can’t sign in: paste your tester token under Use a tester token instead (Settings > Access), or use an offline pack. A token an older launcher stored keeps working until you sign in with an account.
• “Windows protected your PC” appears when you run the installer or a game you downloaded. The files are new, so Windows hasn’t seen them yet. Workaround: choose More info, then Run anyway.

The editor

• If the editor closes unexpectedly, open the project again: it offers back the work you hadn’t saved. Save often anyway while this is new, and tell us the time it happened.
• A new first-person project can look dark and flat. Workaround: in World Settings, raise Exposure or Ambient, or ask your AI to brighten the scene.

Working with your AI

• HUD text set directly, such as a lap counter “1/3”, can show up in double brackets: [[1/3]]. Workaround: ask your AI to set the value as a number, as the Kart Starter does (ctx.hud.set("lap", 2) shows the lap), or to use a text key from the game’s strings instead of the raw text.

Vehicles (Kart Starter and karts you build)

• Driving nose-first into a wall with the wheel turned can pin the kart there, and clipping a thin post with its edge can spin it round. Workaround: press R (Y on a pad), or wait 3 seconds and it puts you back on the road by itself.
• A kart your AI builds doesn’t put itself back when it gets stuck or rolls over unless it has a recovery block (off when absent). Workaround: ask your AI to add "recovery": { "to": "road" } to the vehicle, as the vehicles guide shows.
• The vehicle “assists” settings (traction control, stability control, steering assist) do nothing yet, even though the descriptions your AI reads list them. Workaround: leave them out; tune the tires’ grip (tyres.muLat, tyres.muLong) and the steering lock (steering.maxAngle) instead.

Exported games

• Export says “payload path given twice” or “payload path not allowed”. Not a bug: a game must work on Windows, so two files whose names differ only in capital letters (Logo.png and logo.png), names with < > " | ? *, names ending in a dot or a space, and Windows device names (CON, AUX, NUL, COM1, LPT1 and so on, even as aux.txt) are refused. Workaround: rename the file the message names, or ask your AI to.
• Export says project-path-missing for a file you can see. Check the capital letters: a scene that names Textures/Grass.png doesn’t find textures/grass.png, on any computer. The message names the file that is there. Workaround: change the name in the scene to match the file exactly.
• The first launch of a new game can take a few seconds while Windows checks the .exe, and a little longer the first time a game on a new engine version runs, because that engine is unpacked once (the game itself is read straight from the .exe, with no unpack step). Later launches take about 1 second.

Linux

• This tester build is for Windows. A Linux x64 build is a tarball with the editor and the engine, but no launcher and no samples: the samples come only from the Windows launcher today. See Get started.
• A game exported for Linux needs the ALSA sound library on a fresh Ubuntu: without it the game doesn’t start and says nothing. Install it with sudo apt install libasound2t64 (Ubuntu 24.04).

Other

• Arabic text that starts with a number can lose the number. Only games shown in Arabic are affected.

Features

• Beta (works, below our quality bar): terrain, water (lakes, rivers, shores, waterline), foliage (including the fern preset), lighting and global illumination, characters and animation, vehicles, effects, the editor itself.
• Experimental (off unless a project lists it in "experimental"): waterfalls, the forest-floor ground cover, lip-sync, the Android exporter, asset generation.
• Tested on desktop graphics cards; laptops and integrated graphics are not tested yet.