If you want to follow a video tutorial instead :

Make Your BulletHell or Shooter Indie Game NOW With This Godot 4 Plugin | BulletUpHell Tutorial 1

<aside> 💡 Note : spawning scenes is more costly in performance than default Bullets.

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Spawning any nodes

In case you want to spawn scenes instead of bullets :

1. Add an InstanceLister to the scene and add the scenes you want to spawn as its children.
2. Then, change the child's name as something unique as it will be used as its ID .
3. DO NOT add any unnecessary node as its child because all children of the InstanceLister will be deleted.
4. You can change the properties of the scenes as you need. When you run the game, all the children will be deleted from the scene tree but saved in the global autoload to be used for spawning.
5. To spawn those scenes instead of bullets, just create a BulletPattern and change its resource from Bullet Props to Object Props . Then, set the instance ID property as the unique name of the scene you want to spawn.

<aside> 📌 If you choose the spawn nodes by calling spawn(node spawning the bullet, pattern ID, Shared Area name, ☄️**process_id,** ☄️**cust_bullet) :** main function of the plugin, spawns bullets according to a pattern. If you don't want your bullets to be attached to a node, you can replace the first argument by a dictionnary containing 2 keys : "position" and "rotation", being the global rotation & position of where the bullets will be spawned. (☄️You can add another key “parent” which would be a reference to the parent node of the bullet). *process_id* will give an ID to this function call which will allow you to stop it from spawning later, even if the spawn pattern iterations were set to infinite. The ID must be >0. Pass a dictionary as cust_bullet to overwrite the pattern’s bullet and use a specific bullet prop instead. instead of using a SpawnPoint, DO NOT use a Dictionary as the first argument. For standard bullets, you can use a position-rotation dictionary but for node bullets, you MUST use a node, as this node will be the parent node of the bullet scene being spawned.

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Spawning nodes but still using the plugin’s bullet trajectory system

Instead of an ObjectProps, you can put a BulletNode Props . This is used to spawn a BulletNode instance. Like other scenes, put it under an InstanceLister to allow it to spawn. A BulletNode is a node that acts as a default bullet, whose properties can be customized with the BulletNodeProps. Putting a scene as a child of the BulletNode will allow this scene to move as if it was a default bullet. Ideal to create custom bullet scenes.

Spawning nodes by code

If you do everything by code, without using the InstanceLister :

1. Call Spawning.new_instance(id:string, instance:Node2D)
2. You can now do the Step 5 of spawning nodes using the ID you set.
   1. To generate a BulletNode Props by code, use Spawning.generate_new_bulletnodeprops()