Textures not transparent on mesh even though they are transparent?

Currently, I’m working on something similar to Old Roblox. I decided to import the Crossroads level. I exported it as an .obj, added some classic-ish textures, and when I put it in Unity, with the textures being transparent, it did not appear transparent on the mesh.

Here’s what it’s kinda supposed to look like: https://drive.google.com/file/d/1sgVPCVoofTzLkmSpQzn3eVlHaVo0iJm0/view?usp=sharing

Here’s what it looks like in Unity: https://drive.google.com/file/d/1LOJ6_mYYGg9CQFIg2h4NBJdUIPSPuUPI/view?usp=sharing

The textures are set to transparent in Unity and everything, but it does not appear like that on the mesh. How do I fix this?

You need to use a material & shader that’s transparent as well. For the Standard shader you’d need to set the Render Mode to Fade.