Hey, I’m new to Unreal and made my first scene to play around. Importing my Assets, creating Foliage, Niagara partials and all that fun. I’m happy with how it looks in my viewport but for some reason my Renders look weird. I think I followed every rendering tutorial on YouTube, but these Streaks won’t go away. Is it a problem with the World settings? Or my Assets? What am I missing?
Thanks in advance 
The clue lies in the warning message on the top left corner of your editor window:
You’ll need to look into optimization and/or virtual textures. There are many resources available here and elsewhere online. Perhaps, start here:
Thanks all lot, I thought since I only want to render it and my viewport looked fine, this doesn’t really matter. But obviously it does. However, I fixed that (For some of these Assets I made 8K textures with is way too big for Unreal right?). It got a lot better, but there are still some Artifacts.
I don’t know if this is connected but is it normal that the project file is almost 100gb?
The size of your project will depend on a number of things, such as packaging, which effectively nearly doubles its size (since it duplicates many of the files for the packaged build). Much of that can be deleted with no negative consequence, see here:
Ultimately however, the project file size may not matter as you may have a lot of unused assets simply available but not referenced in the game. Optimization will focus on what is actually being used; so, you’ll want to look further into it.
8K is high, perhaps 4K will suffice. Perhaps, converting as many textures as possible to virtual textures could help. Though, I’ve never attempted to optimize 8K, so I don’t know how effective it will be.
For shadows, you’ll want to look at shadow mapping and/or ray tracing. But yes, texture pool affects shadow performance.
