Awhile ago I followed a tutorial that used the adv Terrian editing tool (activated by 'y' in radiant) and it worked fine. I'm trying to use it again now and no matter what buttons I press it doesn't edit the Terrian in anyway, it either just moves or if the vertices mode is on is just selects them. I know this is a silly question, but how do you use this?

y just brings up the little window

you need to left or right click on the selected patch in 3d view, and i think move your mouse slightly up or down?

Also (assuming your making like hills etc) you need to select paint "height" (or "alpha" if your trying to do a blend)

I know how to bring up the window am I mess with all the settings but still nothing. I just want to know exactly what buttons to press and what mode to be in like when it shows the vertices.

select the patch, hit v

also hit y

then when you move the cursor over the patch in 3d view it will show the Y tools circle selection thing

Make sure your set to "paint" and "height"

The bars above are just to edit the radius of the circle selection thing

Height - adjust height either upwards or downwards of the verts in the circle selection
Alpha - changes the transparency of the verts within the circle selection
Amplitude - how big of a change you want to apply

also when using paint height dont forget to hold down alt, alt+leftclick moves the verts up alt+right click moves them down

oh crap yea lol

my bad, thanks scotch