For my use, alpha is what I tend to miss in PPM. There's the PAM extension [0] but it's not nearly as widely supported as basic PPM. Usually at that point, I

For my use, alpha is what I tend to miss in PPM. There's the PAM extension [0] but it's not nearly as widely supported as basic PPM. Usually at that point, I reach for PNG via stb_image_write [1]. [0] https://en.wikipedia.org/wiki/Netpbm#PAM_graphics_format https://en.wikipedia.org/wiki/Netpbm#PAM_graphics_format [1] https://github.com/nothings/stb/blob/master/stb_image_write.h https://github.com/nothings/stb/blob/master/stb_image_write....