A lot of people ask how I deal with trying to port my work from Unreal to Unity. The process is not necessarly simple since Unreal and Unity work pretty differently.
I start out with importing the meshes and textures since for the most part they stay the same.
Then I use a few different addons to make my life easier. I try to recreate similar shaders using the Amplify Shader Editor, which gives me relatively close results to Unreal.
Then I use Map Magic to try and recreate the demo scene and paint the terrain using slope based rules.
Then I place the foliage using Nature Renderer which greatly improves the grass rendering.
I have come to learn that it's impossible to get the scenes looking exactly the same both in Unreal and Unity and now I approach them differently and try to get the best result I can for each engines, even if they end up looking different with slightly different post processing and color correction techniques.