distanceFadeStart property
Where the reflection begins fading out, as a fraction (0..1) of its
reachable range (the closer of maxDistance and the stride/maxSteps
budget). Reflections ramp to zero from here to the range limit, so they
taper smoothly instead of hard-cutting. 1.0 disables the fade; 0.0
fades gradually across the whole range.
Implementation
double distanceFadeStart = 0.0;