Tracing paper is magic. Yes it is. Recently, I was cleaning out my room and stumble upon some left over tracing paper. I decided to sketch on them just for fun. As I was scanning my sketches I notice that it gives out this wonderful texture that you don't get from regular white printing paper. I am using the Canson brand of tracing paper but I think any type of tracing paper would do fine.
Here is an up close shot of the character's face. There are so many amazing texture when you sketch on tracing paper. It gives out that blurry/cloudy effect without any editing programs. If you are ever bored and want to try something different.