>>1963840>>1963876this is my attempt. is less jagged.
>>1963900i also, hope he is happy. i used the waifu2x service [
http://waifu2x.booru.pics/] to carry out the first of the scaling.
then, i added the noise texture to restore the detail of sharp texture. this area is difficult (to reproduce the texture of the noise). but the use of waifu2x is always necessary as a minimum in order to nicely upscale (づ ˃̶ ω ˂̶ )づ not use bicubic !
i hope i have correctly explained.