Yep, its showing new patches of grass. And on the forest/moor boundary the moor is invading the cleared forest.
(smiles from ear to ear)
Only facts that seem to make sens from what i'm seeing is that new grass is at least 100 points away from the nearest tree. (and thats a uncut tree, stumps don't count as I have some stumps with new grass around them.)
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100 should be 50. Diameter versus Radius hickup.

That tree in the middle is a new sprout by the way.