Landscape material creation
Instead of using the HeightField masks I decided to create my own Landscape material that uses the height of the landscape as masks for better customization.
These tutorials were so helpful in creating this Landscape Material.
https://www.youtube.com/watch?v=lSxDpDyAh2k&list=PLhlDHJpnPTG-WUD_dqu0elvgbbhxklWIu
Landscape Material:
Landscape Material Instance
Landscape Material
Create Layer Function
Color Variation
Landscape Material Applied to Houdini Heightfield
Landscape Layer Foliage Implemented