Adding a diffuser

[Ohmagar]

Hey there,

I have to admit I didn’t properly look into it but from what I skimmed there didn’t seem to be an easy way/a way at all to add a diffuser (something like a QRD or skyline diffuser) to one of the walls.
I get a matrix of varying depths (in meters) depicting the design of a skyline diffuser.
How would I go about adding it to one of the walls to test its performance?

Thanks for the answer in advance.

Best regards,
Ohm.