For months series artist Hamada Yoshikazu has been doing live streams of his Tsugumomo artistry, often with extra details that don’t make it into the final version.
Here are some of the images I’ve collected so far (credit to crafordstinson):
There are also sometimes postings of these images on 4chan from time to time. If you have images in addition to these feel free to link them in the comments and I’ll add them to the post. Thanks!