Hello world I'm talking about changing the ground in Alice3.
I've started a scene and selected the grass template
I'm going to go to set up scene 
and I've decided that I want to add a yeti.
Let's do that.
and then I decide that for yeti, I would rather have him standing in the snow.
So I click on the ground...  select the ground here.
and under paint instead of the grass I'm going to pick the snow.

I'm going to select the yeti and change my camera just a little bit 
so I can see the top.
and sink him down into the snow.
Right now we cannot see his feet.
I'm going to go back to the ground and change the opacity to something like .7 
and now I can see the yeti, and I can see his feet.
You can see the snow is slightly transparent 
so that yeti looks like he's sunk down into that.
I'm going to go back to this and under this I can change and add some fog.
and I can change the light from above to blue.
Cyan would be better, 
and I can change the light from below:  Let's make that white.
Those are a couple of things that you can change.