how to make more and dark smoke?

what lines do I have to add to do this in which jbeam ? Thanks for answers

 

First off you need to start the world editor with F11. Then go to the menu "Particle editor" Then you should get a little window that looks like this:
Almost on the bottom you see a little window with 4 things you can click on in the menu Particles. Particle 1is the one we are lokking at. click on it and choose BNG_smoke_white (2,3)

If you did this go to the top of the menu and choose Particle *

In this menu you can choose Life span color size and a few other things for the smoke. I recommend saving the old settings somewhere else