地形多个材质进行混合

我打算用procedure mesh生成地形,地形可以刷材质,那么怎么才能让多个材质进行混合啊?
I want to use procedural mesh generate terrain In game,and can paint material.
but i don’t know how to blend muti material on terrain.

I want to paint material .then to modfiy material blend data.and what blend data can
change material blend?

anyone can give me some adivce?

material 有一个节点叫 landscapelayerblend 专门用来混合地形材质和绘画的 网上的视频有很多可以看一看