Hey guys, im trying to achieve a ground fog/ mist around the lower terrain to have like a spooky effect, im uploading a sample file…
Hope you get what im saying,
I wanna know how to achieve like a fade out from the bottom part to top… Please check the screenshot 
blender artist question.blend (442 KB)
You can use a colorramp and a gradient texture to mix two scatter nodes with different density. The black and white colorramp values act as a mask, and can be used to change the apparent transparency (scatter density) You could replace the lower scatter node with a transparent node, or a combination.
Looks like this:
blenderartistquestion-mod.blend (520 KB)
ZOMG im bad at resolving my issues at nodes. THANK YOU! 
I will post you the scene that im working on when its done
That’s a nice trick Photox!
