and if you just use two angles which is less fine-grain the performance drops even more by two percent and and if you think about it as vertical versus horizontal like 90 270 instead of 0 180 the performance drops like another two percent so it is particularly important to use both horizontal and vertical and it is more important to use vertical and it is also not so important to use a lot of angles maybe the amount even that that's breathing eight rotations wasn't trained well but it's sufficient to predict four rotations you don't have to