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Wow, this Nanite foliage system sounds like a game-changer! The idea of rendering plants so efficiently, given how complex they are, is really impressive. It's wild to think about the polygon counts on a single tree.

Yeah, that high polygon count really explains the performance hit. Using billboards as a lowest LOD makes sense, but it's always such a jarring visual when they pop in. Hopefully this new system avoids that.

So, Nanite for foliage is the big reveal here. It's cool that it eliminates those ugly LOD transitions we're used to seeing. The thought of having millions of polygons rendered in a dense environment without performance issues is pretty wild.

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Unreal Engine 5.7 introduces the Nani foliage system, which fundamentally changes how vegetation is rendered [0:00]. Previously, creating dense forests led to performance issues due to the high polygon count of individual trees and the need for levels of detail (LODs) which often resulted in noticeable visual transitions [0:30, 1:00]. The update brings "nanite voxels" as a new LOD for foliage, where distant trees are represented by simplified voxel versions, drastically reducing rendering load while maintaining a more convincing appearance with better shadows and lighting [1:30, 2:00]. This system eliminates harsh LOD pop-in and makes distant vegetation appear more dense and natural.

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