Vanilla Vertical Slabs
This resource pack does not change the texture of any blocks in the game. Regular slabs still available with this resource pack.
Here is the very quick showcase video.

Compatibility
- It's compatible with all other resource packs except those that modify the slab model.
- It doesn't require Optifine or anything else.
- This resource pack supports multiplayer. All your friends using this resource pack will be able to see each other's vertical slabs regardless of which server you're on.
Unlimited Creativity
Since the resource pack interacts with item frames, they are considered as entities rather than blocks. This means you can position them as desired.

Recommendation
It is recommended to use an invisible item frame resource pack together with this resource pack, or an invisible item frame obtained with the command. In this way, when you put the item frame and vertical slab next to the barrier block, the item frame image will not glitch.
If you are not going to use barriers, nvm.
Here is the example:
With invisible item frame / Without invisible item frame

Also, this project is available in Modrinth
Quick facts
- Edition: Minecraft Java
- File type: .zip (resource pack)
- Minecraft versions listed: 1.17.1, 1.16.3, 1.19.3
- How to install: Download the .zip resource pack — do not unzip it. → Put it in .minecraft/resourcepacks. → Enable it in Options → Resource Packs.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java resource packs walks through it step by step.
Vanilla Vertical Slabs is a free Minecraft Java resourcepack. Compatible with Minecraft 1.17.1, 1.16.3, 1.19.3, 1.20.2 and newer. Downloaded 3,205 times (via CurseForge). Download it and open it directly in the game.