The second for sure. But remember, AA is your friend.
Also, dont use motion blur if you wish to blur something as it can be very painful if used on the whole image without a resting point. Use variations of gaussian blur and smudge.
@ElvisArg
Those are amasing. Not to fond of the backfire but all in all GREAT
Man this is sad. I've been here playing LFS for years and I don't remember one tiny little thing....how in the world do you take a screenshot and where does it save?