A filter, non photoshop-using one, is just another name for a sfx. Photoshop and vrious other art programs come with special things called filters, they do certain things when used, such as blur, random patterns, create lighting effects, so on and so on.You are persecuted if you use a filter or 2 then send in a skin, its taboo because you didn't do any work.
Also, this tile is REALLY bad, I can't even tell what this is. 1/5.