I am a student currently learning Houdini. I have a question about the sblur and tblur in rsl's environment map vop. Is it possible to apply blur on the reflection map in one particular direction with the rsl environment map vop? I tried to tweak sblur and tblur but only sblur can affect the reflection map.(but no direction canbe applied)

Does anyone know how I can apply some directional blur on the rman reflection map in Houdini?