To cite package ‘materialmodifier’ in publications use:

Tsuda H (2023). materialmodifier: Apply Photo Editing Effects. R package version 1.2.0, https://github.com/tsuda16k/materialmodifier.

Corresponding BibTeX entry:

  @Manual{,
    title = {materialmodifier: Apply Photo Editing Effects},
    author = {Hiroyuki Tsuda},
    year = {2023},
    note = {R package version 1.2.0},
    url = {https://github.com/tsuda16k/materialmodifier},
  }