Last month we built an improved version of the DIY Fog Screen found here.
We call it "improved" since we managed to create a thinner sheet of fog, maintain the projection longer (a fog machine is bursty), and thicken the sheet. We use the same technique of creating a laminar flow. Instead of using a window fan we installed 10 120mm  computer fans with a variable speed controller  to optimize the flow, since we did not know the fog density.
Since the original article doesn't explain the steps / tools / resources required to create a DIY Fog Screen, we'd like to take the opportunity and provide a "how to". In a nut shell, the screen needs to distribute "fog machine"-fog from end-to-end, width-wise, and keep the fog flowing downward sandwiched between two flows of air.Read More