A bookshelf with unevenly aligned different sized books is a quadratic diffuser panel. A bunch of blocks of wood of different sizes and heights is a quadratic diffuser panel. In other words you don't need no 3D printer. All that's good for is making one out of plastic.
What matters is whatever you use, its not only diffusing. Its also radiating. Sound doesn't just hit it and bounce off. Sound makes it vibrate, in other words turns it into a speaker. Same as walls, ceiling, everything.
So what you do, take your 18" square plastic panel, hold it out at arms length, and hit it. Whatever sound it makes, that is the same sound it will impart to your music.
If you're happy with the look, and the sound, then go for it. If not, plenty of perfectly good options to choose from.
None of them anywhere near as effective as a bunch of HFT. But oh well.
What matters is whatever you use, its not only diffusing. Its also radiating. Sound doesn't just hit it and bounce off. Sound makes it vibrate, in other words turns it into a speaker. Same as walls, ceiling, everything.
So what you do, take your 18" square plastic panel, hold it out at arms length, and hit it. Whatever sound it makes, that is the same sound it will impart to your music.
If you're happy with the look, and the sound, then go for it. If not, plenty of perfectly good options to choose from.
None of them anywhere near as effective as a bunch of HFT. But oh well.