[DF-3978] use layer parameter instead of 1.4 constant
[DF-3978] move layer stats mode initialization to GameCore
[DF-3978] remove unused code and unnecessary path checks
[DF-3978] inline HasVertexAttachment
[DF-3978] rename method
[DF-3978] remove sorting for vegetation layer
[DF-3978] rename SpatialData to VegetationSpatialData
[DF-3978] remove PrepareRenderData()
[DF-3978] Change normals and vertex transform
[DF-3978] removed uneeded method, fixed type names