Set size() from calculations within the sketch

[GoToLoop]

@LindowMan

… but it seems that size() has to be the first thing set in a sketch…

You can call size() anywhere within callback settings():

settings() / Reference

Here’s a link for an example on how to it on Processing’s Python Mode:

Use a list to updatePixels()

filter() already got the GRAY type: Py.Processing.org/reference/filter.html It converts all colors to 1 of the 256 grey tones. You state you require 6 shades instead. So we just need to use POSTERIZE after GRAY in order to get the desired effect: """ Gray Posterized PImage (v1.0.1) GoToLoop (2019-Dec-09) https://Discourse.Processing.org/t/use-a-list-to-updatepixels/16268/10 """ def hex6Digits(v): return str(hex(v, 6)) def mapToHex(container): return tuple(map(hex6Digits, container)) FIL…