OK, this is what I'm seeing.

The blue cone DOES show up, but the other cone DOES NOT get larger. They have the exact same cone angle.

I get how to control the decay regions now, thank you! However, why doesn't the fog continue to the last decay region? It always stops half way. Even on your light, it ends at the end of the blue cone, which is only half way to the end of the decay regions.

Decay Rate: How can I use this? All it does is make my fog light disappear. (or maybe it gets really really small.