My latest forest biome in Unreal Engine 4, all procedural 4qkm forest. All assets where scanned using a Sony Alpha7Mii and processed in Metashape. The RAW source meshes have 16k textures and around 60 million triangles. The low-poly versions where also created in Metashape and baked in 3ds Max. All the foliage was modeling in 3ds Max using GrowFX. The UE4 assets are between 100k - 2k depending on their size, all with 4k-8k textures with full LODs. The forest runs at about 90fps in high detail on a RTX 2080.
You can get it on Epic Marketplace or here on Artstation
https://www.unrealengine.com/marketplace/en-US/product/birch-forest-biome