I was working on a terrain.   I modified the splat map to add coastline and imported it.  
The texture imported was great, but it left the trees from the previous texture.  
I tried rebuild clutter mask, clicking trees on and off, nothing fixed it.
Am I mission something?  I want CLEAN BEACHES!   


[Edit]
If I manually re-paint the same sand texture again through the editor, it removes the trees.  But, that sorta negates the benefit of importing a splat.  
