Its not possible to corkscrew, animosity--has to do with the way the mortar trail is created(i would know, i've tried to do this before
) Basically, every image in the mortar trail image set is repeated a bunch of times in a row, and each image is rotated independent of the other images...so when i tried to make the corkscrew, it ended up looking more like a smoke trail. There are only 2 ways I can think of to achieve that effect...one is alter the code of the mortar(dont think this is possible), and the other is look at the code of the mortar, and figure some mathematical model of counter-rotation of each image in the picture....which is not practical