When I was a poor high school student taking pictures of school concerts and stuff and wanted those "star" effects I discovered that you can make a cheap temporary star effect very easily with any number of sides!
Just use your greasy fingers and smear some streaks on the lens filter! make them as regular(crosshatch) as possible and you will get some stars! A bit of experimenting helps. and if it doesn't work just wipe it clean with a lens cloth. You dont need a lot of grease (dont go grap a chicken wing and smear it on the lens!!! ) just normal average human oils on your cheek or forehead will do fine. Just a single light stroke of my forefinger once across my brow is usually more than enough.
Once you are done with it just wipe it clean with a lens cloth.
Moments of Light : D7K D610 18-200 150 12-24 24-70 70-200 + C&C very welcome!
Being a photographer is a lot like being a Christian: Some people look at you funny but do not see the amazing beauty all around them - heartyfisher.