Photoreal Mountains in Blender and Unreal Engine!
Making photoreal Mountains in Blender is surprisingly easy and 100% free!
While this method might not work in 100% of all cases, it's still worth exploring. Not only does it look more realistic than most assets you can find on the Unreal Marketplace, it's also 100% free and super easy to set up.
Just make sure you have the rights to the textures you are using. I recommend looking for good photos of mountains on unsplash.com and pexels.com.