So I'm too lazy to delete the camera and light when I export my models from Blender, and when I expand them in Unity as ".fbx" I can see the camera and light as those blue cubes with the white paper sheet. And I'm not sure if they make the models take up a bit more space, or anything like that. So is there any purpose to deleting them before exporting as .fbx if there's nothing but the mesh? Or should I leave them? Thanks in advance.