schochastics, If for whatever reason you need a fast way to write png files in #rstats, I wrapped fpng (https://github.com/richgel999/fpng) into a simple package (https://github.com/schochastics/RFPNG). Havent fully understood the technical details of this new type of png format, but if you are interested, here is an interesting blogpost on the format: http://richg42.blogspot.com/2023/12/announcing-cpng-compatible-network.html
