way cool!
how did you get the smoke to do that?
I'm pleased you like the image.
I went to a lot of effort to make that image. The least
you could have done, is made the effort to use the shift key twice for your post, making a capital W and a capital H.
But, you didn't, so I certainly don't feel obligated to answer your question.
However, it's your first post so
Welcome to The Photo Forum, and now you know the vast majority of TPF members
do make the effort to make the appropriate capital letters when they post.
I didn't
make the smoke do that. I just made a series of images as the smoke did what smoke does. For that shot the heating system fan was going so there were some currents in the room.
Once the air movement in the room stopped, the flow of the smoke became more laminar and looked more like