cheers Both, Allan I use incense sticks for the smoke, tried all different way but find incense the best to use also you get a nice smell about the place lol, every now and then Ifan the smoke with a sheet of a4 card to get the smoke to move around more, speedlight set up to the right of the smoke, and a nice darkened room
the black background I use is a muslin sheet about ten foot by 8 foot its attached to backdrop stands, but any non reflective black material will do, just make sure no stray light hits the backdrop, It can also be done with a bright set of led's if you have any of those use them to light up the smoke, then the flash isnt needed but the better results are with flash, worth a go though until you get a speedlight