Hello Aaron and Alex,
In my own research, I could also not find any suitable info on any graphical issues related to changing scale. I’d be keen to learn more about the specifics of this as well.
Edit: Aaron’s reply was not appearing for me when I first sent this message, apologies! I did see other users talk about problems with shadows and shading while adjusting scale, I’m doing further research on how others may have surpassed those issues.
I did want to add a resource I found that could help with making the decision of what scale to use:
This thread here where a discussion is had about various pitfalls to changing world scale, which references this thread (which I believe to be the link they posted, however the original link was unavailable) that talks about this article.
These may be issues that we’ve all already been aware of when deciding on scale in Unreal, but I figured they would be useful information to you if not, or at the very least a good guide for those who look in on this thread in the future!
Thanks,
Kyle B.