Photoshop Filters (October 2014)
Photoshop CC (October 2014) lets you create flames and trees along a path. Here are some examples created with that method.
Photoshop CC (October 2014) lets you create flames along a path. Here's some light painting created with that method.
Another stab at using the Flame filter in Photoshop CC. I really like the result.
Photoshop CC (October 2014) lets you create trees along a path. Here's a digital Sakura Cherry Blossom tree created with that method.