Find out here how I optimized my gloryholes with great success. I built everything myself and am not a professional carpenter. I'll give you the best tips on how I implemented it and you can easily recreate it or have it built. I'll also tell you what went wrong and why I can't recommend one or the other. Before you make the same mistakes, save time and read it here

History
My first Gloryhole was just a curtain from Ikea and then later made of washable tent canvas. But I was annoyed by the people who always looked through the curtains.

I also tested blowing the hot guys under the curtain half under the curtain like in the picture until the end, but it wasn't that comfortable for me. But the cool thing was that I was able to lick the squirting building clean

A little later the Travel Gloryhole was invented "Red Gloryhole"
So I decided to build a gloryhole with a wooden wall that I then had to take down again and again.
This is how the glorybox with real walls came about. I had to rent a hobby room specifically for this. The downside, there were no toilets or washing facilities.

So I optimized the glory hole again. And now it's a fixed gloryhole in a room hidden between Ikea cabinets with a sliding wall. It's ready in 2 minutes.


And this is how it works with the sliding wall. And it holds very tightly.
Materials and Tools
Materials:
Wooden board (e.g., plywood or MDF, 18–22 mm thick): Dimensions depend on the desired wall size.
Wooden frame (e.g., 2 x 2 inch wooden beams): For stability.
Metal hinges (optional, for a foldable setup).
Wood screws and nails.
Paint or varnish (optional, for finishing the surface).
Plastic or rubber ring (to protect the edge of the hole).
Sandpaper (grit 120–240).
Tools:
Drill with a hole saw bit (e.g., 4–6 inches in diameter).
Jigsaw (for cutting the wooden board).
Screwdriver or power drill.
Measuring tape, pencil, and level.
Sanding machine (optional).
Step-by-Step Instructions
1. Planning and Dimensions
Decide the size of the wall. A typical height is around 2 meters (6.5 feet), with a width of 1–2 meters (3–6.5 feet), depending on the space.
Determine the position of the hole: Commonly placed at 36–43 inches (90–110 cm) from the floor, depending on user requirements.
2. Build the Frame
Construct a sturdy rectangular frame using the wooden beams (e.g., 6.5 feet tall and 5 feet wide).
Secure the corners with screws or metal brackets for stability.
3. Attach the Wooden Board
Cut the wooden board to match the frame dimensions.
Securely attach the board to the frame using wood screws, spaced 8–12 inches apart along the beams.
4. Cut the Hole
Mark the position and size of the hole (e.g., 4–6 inches in diameter).
Drill a pilot hole at the edge of the marked circle to create a starting point for the saw.
Carefully cut out the hole with a jigsaw. Alternatively, use a hole saw for a cleaner, more precise cut.
5. Smooth the Edges
Sand the edges of the hole to make them smooth and safe.
Optionally, attach a rubber or plastic ring to the edge for additional protection and a polished look.
6. Stabilize the Wall
Install the wall as freestanding or attach it to an existing structure:
For freestanding: Add support legs or a base to the frame.
For fixed installation: Secure the wall to the floor or adjacent walls.
7. Finish the Surface
Sand the entire surface of the wooden board and apply paint or varnish to protect it and improve its appearance.
Basic Plan (Front View of the Wall)
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Side View with Frame and Board:
Frame: 2 x 2 inch wooden beams.
Board: Wooden panel securely screwed onto the frame.
Support legs: Optional for freestanding walls.
Safety Tips
Ensure Privacy: Build the wall in a space that is private and appropriate for its intended use.
Maintain Hygiene: Regularly clean the wall and implement appropriate sanitary measures.
Check Stability: Ensure the wall is stable and cannot tip over.
I am not a professional craftsman. I'll tell you here how I did it: I had wooden panels (very thin wooden panels) MDV cut to size at the hardware store according to my wishes. And the hole with a drill and jigsaw. All in all I paid €300.
Of all the glory holes I built, the last one with the sliding door was the best. There is another flap at the bottom and I will open a separate topic for what exactly it is