private RenderGeometry BuildTileBaseColliderGeometry()
{
RenderGeometry geometry1 = BuildTileBaseGeometry();
RenderGeometry geometry2 = BuildTileBaseGeometry();
geometry2.ApplyScale(0.5f * Vector3.one);
geometry2.ApplyOffset(-0.01f * parent.faceNormal);
geometry1.CombineGeometry(geometry2);
return(geometry1);
}