I created these videos a while ago, and finally uploaded them to Youtube for your viewing pleasure. Most are linked on the INI guides, but I think one or two are not.
Smooth sun-shadow transitions
fSunShadowUpdateTime sets the speed of sun-shadow transitions in seconds. It is recommended to be adjusted to minimize the transitions.
fSunUpdateThreshold sets the time between sun-shadow transitions. A value of 0.05 is equal to 1 second, so a value of 1 equals 20 seconds. Increasing this also increases the distance the shadows will move during the transition. It is recommended to be adjusted to minimize the transitions.
Default Sun Shadows
STEP Tweaked Sun Shadows
Other Various Tweaked Sun Shadows