The technique you’re looking for is called a height lerp. Lots of tutorials on YT about using HeightLerp with vertex paint if you need, but it uses your textures heightmap to drive the blend and get a natural looking transition.
The technique you’re looking for is called a height lerp. Lots of tutorials on YT about using HeightLerp with vertex paint if you need, but it uses your textures heightmap to drive the blend and get a natural looking transition.