It looks better this way... I'm thrilled with the snow that UE5 nanite performs.
I recreated the tree, enhancing the details of the leaves and branches. The resulting snow mesh is thus further refined. A set of snow meshes have 300w+ triangles.
Nanite's content support for high triangles is very handy. 400 of these trees are arranged in the scene. With Lumen turned on, the RTX3090 runs at 2560x1440 resolution at 40~50fps. DLSS is not enabled...