I want to use some sort of gel or other material in my fresnels in order to make their wash a little more random and less perfect. I need some sort of amber or yellow that has some randomness and a blue/gray.
Light is a funny thing. One of the most important things i have learned is how to be tricky. Yes, you should try overlaying different lights from differnt postions with differnt colors. But i would first look at why you are using a fresnel instead of an ERS (budgetary i understand). but i thnk what you might want to try to do is make a random split gel- take some burned out R02, and and cut shapes out of or from it . . . add in some neutral density, some blues in the holes that you've cut out. Don't try to make it perfect, it will drive you nuts. once framed, put a cut of R119 in front of it (so that the light passes from the lense to the split gel to the silk to the stage). It adds a nice soft edges to the colors, making them blend together.
If you don't mind me asking, what are you trying to acheive with this?