And if so, how would it be done? I’d especially love to learn how the noise/texturing is done as well!
Answer
These are definitely made by hand. These are so called “scientific illustrations” absolutely beautiful. Check your local library or internet for “botanical illustrations”
I think it’s not possible to fake this with photographs and filters. Or at least not with that amount of quality.
Attribution
Source : Link , Question Author : charteroak , Answer Author : KSPR