to solve this problem, just enter the mesh which is a sheet, go to LOD Settings and in LOD Group change from none to Foliage.
https://forums.unrealengine.com/filedata/fetch?id=1796477&d=1596477085
to solve this problem, just enter the mesh which is a sheet, go to LOD Settings and in LOD Group change from none to Foliage.
https://forums.unrealengine.com/filedata/fetch?id=1796477&d=1596477085