Sorry for opening an issue for this, but I couldn't find information elsewhere. At GDC Unity showcased a lot of terrain features including hydraulic/thermal/wind erosion brushes as included in 2019.1, but they are nowhere to be seen in the public 2019.1 beta so I'm assuming they might be distributed in some repository or package. Since this repository has received no updates in six months, I'm assuming those features are distributed elsewhere - could someone point me in the right direction?