Once again the school board has refused to buy cyc lights for our PAC. I am needing to light the cyc RGB style, with either 9 or 12 Altman Star-Pars (source 4 par knock offs.) In the past when I have done this I have ended up with a cyc that appears to just have beams of light, and not a nice even spread of light. What is the best diffusion or gel to use to create this effect with pars? The electric is about 5' from the cyc.