Hello! Maybe someone will help me with this strange problem.
So, long story short, I’ve got a model - a motorcycle. I modeled it in Maya and exported into Unreal Engine (5.0.1). I discovered with surprise that the mesh of tyres got many tiny holes in it. All of them presumably are situated on places where my mesh is most dense.
I tried everything - checked the mesh via cleanup, different exporting options (all variations), triangulation in Maya, OBJ anf FBX formats. So far nothing worked out.
One thing I noticed - lowpoly model works fine, but when the mesh gets more dense - it gets more holes on those places. For example, tyre on lvl1 subdivisions has 200k polygons and it already starts to have some holes. When I crank subdivision to lvl 2 (2 mln polys) it gets a lot worse.
Sometimes this happens when you import a model too small and you scale it too much.
Especially if it has many vertices, it’s like Unreal can’t compute that many vertices together and just removes them.
as of now I have a fix for it that is while importing the model in unreal the scale section scale it to 10 and after importing scale down the model by 0.1 then it will be fine. I know its not permanent fix but it is work around.