XL (300mm x 300mm or 11.8 by 11.8 inches) Version of my Acoustic Sound Diffuser Panels.

If you'd like, you can bring color to your panels if you have multiple extruders, by splitting the object in Parts, setting your Multi Material Painting (n) tool type to “Bucket Fill”, and start painting away! Do keep in mind of the eventual wipe tower, as these panels fill up the bed by quite a bit. I also recommend disabling Background Processing (Auto-Slicing) while painting, since PrusaSlicer keeps wanting to re-slice after every painted block.

The original description of the smaller panels listed below;
 

Based on the panels featured in this Youtube Video by 3D Printer Academy and not being able to find any files for them, I decided to create a random assortment of these panels with a randomly generated height.

Panels are either 90mm x 90mm (3.5 by 3.5 inches) or set the scale to 200% to get 180mm by 180mm (7 by 7 inches) panels.

Infill depending on how much filament you want to use, I'm assuming 10% should be fine.

These plates do not have built-in tapered screwholes because I personally didn't want to drill hundreds of holes into my wall (you're welcome neighbours). Use either a strong adhesive / doublesided tape, or add the screwholes yourself.

Grab any OBJ, place it flat on the bed, and start printing in your favourite material and colour!