![I tried to cut out a hole for my mask but the inside turn out to be hollow. How do I fill in the gap so that the hollow inside won't show I tried to cut out a hole for my mask but the inside turn out to be hollow. How do I fill in the gap so that the hollow inside won't show](https://preview.redd.it/38jdlp0yfrk61.png?auto=webp&s=232f4e1ed919d77f318088c9474a608261a5b616)
I tried to cut out a hole for my mask but the inside turn out to be hollow. How do I fill in the gap so that the hollow inside won't show
![modeling - How do I make a square hole in a cube, and then save it as one mesh? - Blender Stack Exchange modeling - How do I make a square hole in a cube, and then save it as one mesh? - Blender Stack Exchange](https://i.stack.imgur.com/UtqVu.gif)
modeling - How do I make a square hole in a cube, and then save it as one mesh? - Blender Stack Exchange
Cell Fracture creates pieces around hollow inside - Particles and Physics Simulations - Blender Artists Community
![How to Make Hollow Object, Cube, Sphere in Blender, for both Visualization and 3D Printing - YouTube How to Make Hollow Object, Cube, Sphere in Blender, for both Visualization and 3D Printing - YouTube](https://i.ytimg.com/vi/_O_KRh3HL_0/maxresdefault.jpg)
How to Make Hollow Object, Cube, Sphere in Blender, for both Visualization and 3D Printing - YouTube
![Blender 3D: Noob to Pro/Advanced Tutorials/Blender Scripting/Object, Action, Settings - Wikibooks, open books for an open world Blender 3D: Noob to Pro/Advanced Tutorials/Blender Scripting/Object, Action, Settings - Wikibooks, open books for an open world](https://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Blender255WindowsMarked.png/800px-Blender255WindowsMarked.png)