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I'd wager that is simply intended to convey a perspective change due to "kickback/recoil".
A pity Dday doesn't support smooth animation between model skins (as far as I am aware Dday can't do this, yet), as this weapon would look much better with such a feature.
There was 3 or 4 iterations before I pleased the result. Now it moves like it belongs to Raistlin from DragonLance series. Lazy and powerful!
Also, I know the sprite instantly changes from blue back to normal after a shot, but I wonder if maybe that should be replaced with a very quick fade down for the model?
Milten, just for you I have an alternative animation of hand with a sprite-like motion
There is a long known issue that hud weapons are set too low in anything other than 4:3 screen resolutions.
Why not have the bits of ice in the ice death FX shrink to nothing, instead of having them suddenly disappear when they get very small?
the explosion radius may be a bit too big
frost shard projectiles could stand to be a slightly darker blue