I remember trying to figure out how a certain lensing effect was done in the werkzeug a few years back. I really invested quite a bit of effort in this, and I never did work it out (yes, I did use all of the umm, obvious techniques for this). I'm really looking forward to finally figuring out this one thing that eluded me for so long. Farbrausch are the greatest. Long live Farbrausch.