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@unreal dev people I did find some very cool perf "hacks" on unreal recently Only if you're using CSM shadows though (I'm optimizing for SteamDeck) So apparently there's a concept of "Far Shadow" which is a separate cascade reserved for vista objects, objects you have to mark as "Far Shadow"

Excuse me if some of y'all knew about this already but I somehow didn't (Applies to UE4 too) You can see here the interior of this dungeon on Medium doesn't get shadowed by the Directional light

I got around this by making a shadow mesh around the entire dungeon (With holes to let the actual windows work) And marked it as "Far Shadow"