Ok i see what’s going on;) you have a leaf; it has top and bottom - with this mesh it doesn’t, only top.
Only leafs facing player with their tops are visiable. When you move, some of them flip from visiable to not and viceversa.
This mesh is just too simple when it comes to leafs. Rotate Z and you will know what i mean. Why would someone make a mesh like that? It is supposed to be viewed from top with zoom-out.
every leaf is a separate triangle - hence even though this mesh is so optimized it still ‘weights’ in triangles almost the same as this one - but thats how needle ‘realistic’ spruce probably demands it
