I made real HD arrows with new design of the fletching. Of course it requires Dawnguard.
Edited files:
Sunhallowed arrows: aurielsarrow.dds aurielsarrow_m.dds aurielsarrow_n.dds also with alpha
Bloodcursed arrows: aurielsarrow_blood.dds aurielsarrow_blood_n.dds I also added a specular map: aurielsarrow_blood_m.dds and edited aurielsarrow_blood.nif and aurielsarrow_bloodflight.nif
I added also a compatible mesh for Proper Length Arrows. They don't glow any more and use the correct textures.
Installation: use any mod manager or extract the folders into your Skyrim\data directory.
Deinstallation: Delete the files in the Data\textures\dlc01\weapons\auriel directory and for the bloodcursed version delete also the files in the data\meshes\dlc01\weapons\auriel directory.