Multiresolution Hash Encoding (Instant NGP)

Drag point x to see multi-resolution hash encoding. Feature values use Viridis colormap (Purple = 0, Yellow = 1).

L=2, b=1.5 T 1/N₀ 1/N₁
x = (0.50, 0.50)
N=4: wₓ=0.00, wᵧ=0.00
N=6: wₓ=0.00, wᵧ=0.00
(1) Hash vertices
T (Level 0)
Voxel (l=0)
F₀, F₁
T (Level 1)
Voxel (l=1)
F₀, F₁
(2) Lookup
(3) Interpolate
y
L · F
+
E
(4) Concat