The grass is just some colors (PF), a no color PF with small 'hillocks' (like 0.5/1.5/0.01, displaced 20cm), only in the rougher grass areas, and one fake stone shader of 0.005m, 12 high, density 2, no color. Plus some tiny fractals masked by patchy fractals for the flowers. Rendered at detail 0.5, AA5 I think.