This is a environment for an alien world with a stylized artstyle. Bright Colors, painted textures. This also uses PBR textures, roughness and metallic.
Mushroom Shape All Sides with Wireframe and Polycount
Mushroom in Substance Painter with full detail
Rock Wall Model with Painted Textures
Stalagmites
Big rock sides with Polycount
Diffuse texture for land
Grass Textures, cyan background for chroma key in unreal.