1. I used the fog effect in spotlight, everything works wonderfully, except when I render the fog doesn't appear.
However, when I create in a new scene, i can get the fog working alright, but when I imported that light scene to my original scene, the fog disappears again.
2. I also tried volume light and volume primitive. but with both, I can't control the density. I want the light density to be very bright at the top (where it's near the lamp) and less bright/less dense at the bottom (when it hits a surface).
If you have any suggestions or advice, it's much appreciated. Thank you!