Has Prototypes

bool HasPrototypes(TerrainTexturesExporterEnum.Prototype prototype)

Checks if TerrainData has prototypes (tree, grass or detail mesh)?

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​bool HasPrototypes(TerrainTexturesExporterEnum.Prototype prototype, int splitCountHorizontal, int splitCountVertical, int splitColumnIndex, int splitRowIndex)

Checks if multi-chunk 2D grid mesh with index splitColumnIndex and splitRowIndex has prototypes?