Here's an update on the leaves. I've been trying out ways making some of the flowers and plants in SpeedTree. I'm still trying to wrap my head about the flowers, and making the back side of it. So far, I'm planning to make a couple of these, that'll be around the grass, to avoid just having a green grass look around the scene.
I initially was using a bunch of materials and textures from MegaScans and GameTextures, but decided to go back and make the foliage from scratch. They'll be fairly small, but for the most part, I just wanted to make them, for the sake of the portfolio piece. I didn't want to just fill up the majority of the scene with assets that aren't mine. Aside from the foliage cards, I'll probably go back and make a moss material that's covering the rocks, that's probably the only other material that's not mine (it was from Substance Source). The paint passes were done in ZBrush. I went the route of just using the Polypaint tool.