The island terrain made in @quadspinner’s Gaea and the trees or vegetations with @polygoniq.xyz’s Botaniq add-on in Blender
To optimize the vegetations from high poly to low poly with complex parallax shader nodes, I used Instant Impostors add-on by Alex Heskett aka Nugget on Twitter and YouTube
Rendered in Blender Cycles with 100 samples ( 8-10 minutes for single frame or single image )