Custom Paintings is a release file of the Minecraft resource pack bibliocraft custom paintings, made for Minecraft 1.12.2. It was published on April 2, 2022 and is 4.1 MB in size. For the full description, screenshots and every other version, visit the bibliocraft custom paintings resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.