Const
Sprite-edge iso-contour: the fraction of peak intensity at rho = 1, which the shift subtracts away. 1% is the historical choice — small enough that the visible sprite edge is imperceptible, large enough to keep K modest.
rho = 1
K
Sprite-edge iso-contour: the fraction of peak intensity at
rho = 1, which the shift subtracts away. 1% is the historical choice — small enough that the visible sprite edge is imperceptible, large enough to keepKmodest.