This is a paid asset, but now you can download MicroSplat – Scatter Free.
Detail this asset from Unity Store: Original Link
MicroSplat – Scatter v3.5
The Scatter module for MicroSplat adds several new features to the MicroSplat framework.
Features Added:
– Paint up to 32 additional texture onto your terrain, as detail masks and modifiers.
– Each texture can choose from several blend modes, allowing you to accumulate leaves onto a surface, or blend moss into an underlying textures.
– You can paint one or two layers of texture, allowing you to paint moss on the peaks of your rocks with leaves on top of the moss.
– You can filter how each texture is applied based on the height and slope of the underlying texture’s data.
– A custom painter is used for painting these details, and a single custom format splat map is used for up to 32 textures.
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Requires the MicroSplat framework to be installed.