Last year I build a burning smoke grenade in the classic way, by using an armature and self made colored upholstery foam. You can read about this here.

Now As I got a 3D printer last year and I acquired some STL files for smoke effects like missile exhaust , explosions etc from Deadly Print Studio I tried there smoke marker STL . I modified the file a bit to get different sizes of smoke . Then I printed them out based them in the usual way and added a little smoke grenade. Here are the results:

These are the two designs you get from Deadly Print.

Now I combined them in Tinker CAD to make these:

The miniature is an Empress Miniature added for size comparison .

Here are some more pictures:

What do you think which is better ?