This blog post guide helps Rocket League players navigate the complexities of using custom maps via the Labs_Underpass_P.upk method.
Disclaimer: Modding Rocket League is done at your own risk. Always backup your files. Map files & packages - RL Modding Wiki
Ultimate Guide to Custom Maps in Rocket League: Mastering Labs_Underpass_P.upk Labs_Underpass_P.upk
It is considered one of the best methods to load custom maps on PC. How to Set Up Custom Maps (Step-by-Step)
Have you ever wanted to play custom Rocket League workshop maps but felt lost with the file management? The most effective way to play custom maps on PC is by utilizing the map as a base. This blog post guide helps Rocket League players
This method is primarily for local play and Freeplay.
You don’t need to swap files between playing online and playing offline. Map files & packages - RL Modding Wiki
You can directly create or import meshes and textures inside your level package.