Important: G-B-Shrooms-Rocks.mat has multiple layers of ecosystem, and the grass layer is dependent on the tree layer. To populate, start with the rock (Default) layer--that's your foundation. Then populate the Bushes layer. Then populate the Trees, and then last, the grass. The grass will be more dense around the trees. Note: The Rocks layer didn't want to save the name in the mat, despite repeated tries. It is instead still named Default layer.
