How would I make a couple MeshInstance3D's into one?

[KingGD]

Hello there!

If you want to merge a MeshInstance into one, it’s not possible directly. However, you can achieve this using the following methods:

1. Move all your MeshInstances into a Node3D (so you can easily move and edit them).

2. Export your models as a .gltf file (File → Export), import it into Blender, then export it from Blender and import it back into Godot.

3. Create your own plugin for merging meshes. This is possible but can be challenging.

Similar Topic:

Is there a tool to merge meshes in the editor?

Godot Version 4.2.2 Question I am building a scene out of many individual segments, eg. walls, floor, windows etc. Is there a way to combine these in the editor after I’m done so that there aren’t as many individual meshes and therefor drawcalls? Other addons or advice are welcome. Thank you in advance.

As you described, you wanted to make walls, here is the best steps for it:

1. Add a CSG Combiner
2. Add a CSG Box inside it as a wall
3. Adjust the sizes/positions and duplicate it if you want to create four walls.
4. Enable collision in the CSG Combiner