Foilage not working on world composition level

i import a landscape weightmaps and material using world comp and then it wont let me use the foilage tool to paint foilage on it no cirlle for brush or nothing

Hi,

Foliage tool paints only on objects that are in “current” level. So to paint foliage on a landscape tile you will need to make corresponding sub-level “current”, by double-clicking on it’s name in the “Levels” window.