Hi, Finished a grass shader and submitted to the marketplace. This function allows to quickly pump out infinite variations of a single grass. PrintScreen FTW!
I really like using an add on for Blender called the PolyQuilt tool which works very similarly to Maya's Quad Draw which I also like, but it has even more functionality since you can work in other modes beyond vertex (edges, tris, quads and n-gons) and because your doing this in edit mode, you have access to Blenders full…
Both. You'll probably use vert paint, being cheap and effective way to blend materials, and probably masks, even if it's just a basic noise and gradient material function to break up vertex paint blending or height lerp from a height imput for example. Also don't forget decals on top of what ever solution you use.