Session by Marc. Written by @NarigoDF.
We've played around with Marcs shader-playground repository and later had a look at shadertoy. The Eye demo is still giving me nightmares as many vector values were more or less randomly edited, resulting in extremely strange effects.
After playing with shader-playground during the session, we decided to add a live editor on the page. You can now code directly on the GitHub page and play around with the images.
Try for example switching channels by using this code:
newPixel[CHANNEL.RED] = currentPixel[CHANNEL.GREEN];
newPixel[CHANNEL.GREEN] = currentPixel[CHANNEL.BLUE];
newPixel[CHANNEL.BLUE] = currentPixel[CHANNEL.RED];
newPixel[CHANNEL.ALPHA] = currentPixel[CHANNEL.ALPHA];