• Only the latest version is being supported. If you are using an outdated version, upgrade to the latest version.
• Provide instructions for how to reproduce the issue. Include the minecraft version and mod version.
• Forge version issues belong to https://github.com/qouteall/ImmersivePortalsModForForge/issues
• If it's a mod compatibility issue, post that mod's link and open another issue on that mod

1. Make sure that you installed the mod.
2. After installing this mod vanilla portals won't be changed, you need to light new portals

Are you using shaders? If so, that's the problem.

Im not

Close because outdated.