- Edited
I solved the problem of the texture not showing up, on an imported .blend file, by adding an Environment to the Camera3D.
But I don't see a "separate texture folder".
I'm using Godot 4.1.1-stable.
The .blend file was created in Blender 2.8.3, and Godot uses Blender 3.6.1 for importing. (I set it up like that because Godot 4 requires Blender 3 for importing, but I can't use Blender 3.6.1 for modeling because it keeps crashing.)