How it works
The depth of the well at grid position (i, j) is set by `(i² + j²) mod N` over an N×N grid of prime N. Because it scatters in two axes, one module already breaks up reflections well; tiling several modules across a wall benefits from modulation to avoid a repeating lattice — Fresnelcut turns that on automatically.
Each cell is a square block of a set footprint. The deepest cell drives how thick your stock needs to be, which Fresnelcut reports as you design.
d(i,j) = [(i² + j²) mod N] · λ₀ / (2N)An N×N grid (prime N). The additive residue array is what gives two-axis scatter.
Best for
- Ceiling clouds and large rear walls
- Rooms where reflections come from several directions
Not the tool for
- Bass problems (use an absorber)
- Tight side-wall strips where 1-D scatter is enough
Start from a common size
N is the number of wells (a prime). More wells scatter more smoothly but make a wider, deeper panel. Pick one to open the designer pre-set: