This is a paid asset, but now you can download Glowing Mushroom Forest Free.
Detail this asset from Unity Store: Original Link
Glowing Mushroom Forest v1.1
A collection of assets to build a fantasy/alien mushroom forest environment.
✓ 2-Level LOD Groups For Tree Prefabs
✓ Customizable Emissive Colors
This package includes:
-5 Different Giant Mushroom Trees
-5 Different Ground Detail Mushrooms
-2 Mycelium Overgrown PBR Ground Materials (shader not included)
-Mycelium Overgrown Rock
-Mycelium Overgrown Stone Light
-Pre-Baked Practical Demo Scene
Each prefab has a PBR material with an albedo, normal, height, AO, and emission map.
Giant Mushroom Trees: 4096×4096
Ground Materials: 2048×2048
Stone Light: 2048×2048
Ground Details And Rock: 1024×1024