Blocking emitters in UDK

Hi there!

I have purchased the Unreal dvd "Creating cinematics & Enviroments effects". In this dvd you can create a "wind effect" that runs through the level. It looks like Blueish smoke running through your level. This is created with an emitter.

My question here is: Is it possible to block this emitter? i have created a really cool looking jungleish level with the blue smoke flying through the level. My plan is to have a shed in the middle of it, but atm I got my shed with blue smoke coming through it.

Can this be blocked in some way? or do I have to just tweek around the emitter in the level, so the smoke avoids the shed?

Best regards

Bjørn Christoffer Strid.