This version of Unity is unsupported.

TerrainData.SyncTexture

public void SyncTexture(string textureName);

Parameters

textureNameThe name of the Terrain texture to synchronize.

Description

Performs synchronization queued by previous calls to CopyActiveRenderTextureToAlphamap and DirtyAlphamapRegion, which makes CPU data of the alpha map textures up to date.