Hi all. I am looking to improve my skills in creating environments/landscape. I tend to love open worlds in UE4, which also is as photorealistic as possible, but that also tend to increase the file size by, well, let’s say quite a bit.

I guess I have a lot to learn regarding how to use memory efficiently and perhaps using graphics APIs to make the game run smooth, even though the file size gets quite high, or is there any other tips for how the world could look nice, but be hardware-friendly as well?