What you are seeing in this image is a ray of light skimming across the a lit translucent particle effect. So, in the Content Examples, the m_flare_01 material is close to what was used in the above particle effect except change the Material Blend to Translucent and shading model to Default Lit. Ultimately though the effect you are seeing is not a material at all.
Oh i see, this is huge for me because it brings some light on the grainy reflection effect i want to archive, can you plz give me some ideas on how to archive this reflection effect: