Mapping FAQ

To make maps, you must have Everest (the mod loader), and Lönn (the map editor) installed. Both of these can conveniently be installed using a program called Olympus 🔗. For up-to-date Lönn documentation, including installation information, see https://github.com/CelestialCartographers/Loenn.

Map-Making FAQ

How do I save maps?

Control and S.

How do I delete a room?

Alt and Delete.

How do I make a room?/Why is my screen blank?

Click Room at the top, and then Add.

How do I automate boring tasks?

Lönn Scripts 🔗 provides a convenient script interface to do common bulk actions. Several helpers add additional scripts to this plugin. If you know how to program, it's fairly simple to make your own custom scripts for specific tasks.

How often are collab maps?

There isn't a set schedule, but generally every few months. Collabs, contests and other projects are usually listed here 🔗. You can also ask in the Celeste Discord 🔗.

How do I add room transitions?

Add one player entity per room entrance / exit.

How do I add a B side to my own map?

YourMap.bin + YourMap-B.bin

Why doesn't my golden berry appear? / Why doesn't my C side appear?

You'll need to collect each heart in every A and B side in the levelset and complete the side at least once, or use cheat mode.

How do I use Stylegrounds in Lönn?

See the Stylegrounds tutorial here.

How do I add my own decals in Lönn?

Lönn will find it if you place it in Celeste/Mods/YourMod/Graphics/Atlases/Gameplay/decals/author/decal.png
Filenames ending with numbers will be used as animation frames by Celeste; Lönn hides all of these frames besides the first frame (00) so the decal list is not cluttered.
If it doesn't show up in your decals list, even after refreshing it, try to restart Lönn.

How do I convert my map to a .zip?

.bin maps are not recommended for public distribution, and it is recommended to use a .zip instead. If you would like to convert them automatically, you can use Postcard 🔗. For more detailed information, check the Mod Structure article.

How do I add a checkpoint mask onto my custom checkpoints?

Postcard 🔗 can do this automatically. Simply upload your screenshot, hit submit, and save the new image. Please report issues to @leo60228#0480 on Discord. If this doesn't work, manual instructions are also available on the Map Metadata page.

How do I make objects like fireballs have more copies of themselves? / How do I add more of those small activator squares to triggers?

These are called nodes. To create them, press N, and you can move them and delete them like normal objects.