Just as I stated on my previous Portal 1 submissions; this games relevancy is almost non-existent. So I'll keep this nice and short. I noticed that the vine variant of the early alpha/beta portal textures had an awkward purple taint to the closed portal animation. I took the liberty of changing the texture to match specifically the color of the portal that the background is in.
This change was very minor and is almost not worth a new submission.
I make these for my own sake and upload them just for archival purposes anyway.