I also copy source normals to destination, but still it is dark. When I call calcNormals() every frame everything is OK, but very slow... And next problem is, that I create plane with 10*10 square (two triangle), mesh have 121 vertices, but I think, that should be 100?
edit: Oh, I created same plane in 3Ds Max and of course it also have 121
But normals is still bad