How to make a seamless teleporting doorway (for a Tardis)

Hi everyone! Me and my brother really want to make a Dr Who game as a passion project. In this game we want a functioning Tardis which for those who don’t know is a time machine police box that is bigger on the inside.

I want to do this on Roblox but I’m not sure what method. I’ve heard viewport frames might be the way to go? The teleportation portal demo by @EgoMoose (Teleportation portal demo - Roblox) looks promising but when you get very close to the portal it becomes pixelated/distorted and its really important to me that you can walk seamlessly through.

I found a game called Parkour Tower by @Cracky4 (Tower of Impossible - Roblox) where you can walk seamlessly through these archways and I didn’t even notice they were portals at first.

Does anybody know how I can pull of this effect?

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The problem with viewports is that they aren’t infinitely detailed, and as seen in EgoMoose’s representation of a portal system, can be quite distorted when walking through. There isn’t many alternatives unless you hand make your map to be specifically designed for this. I’m sure there’s other ways to do it, but for now, viewports are pretty standard.

You could do a weird method that checks if parts are visible through said tardis, but I wouldn’t recommend that

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I don’t know the specifics behind it, but if you don’t want the blur your best bet is moving parts.

From what I understand though, @EgoMoose has the best method. All modifications of his portal are either too laggy, or something is wrong with it. Every method has it’s flaws.

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Ok thank you, I will look into this.