I'm trying to learn how to make the smoke in blender and I found this tutorial. I tried to apply the tecnique to my specific situation. Infact I'm creating a 2D animation with a man that brings his hand / lighter to the mouth/cigarette and he lights it up. The author of the tutorial used a black background and with it the blurred/smoke is very well visible,BUT in my scenario,I'm using an orange background and my smoke is not clear. But if I make the background invisible,I can see it. I think that I should adjust some parameter but I don't know which and where it could be. Check the attached blender file to understand. Thanks.
In the pic below you can see where the smoke is,but with a lot of difficult :
instead,on this pic,you can see it very clear :
and here you can see the picture of the node tree...