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My graphic programmer brain forced me to spend far too long moving the camera and Raz back and forth through the clipping plane trying to see the magic. The consistency in light and colour from one side to the other was so so good. I think the only tell was a tiny hint in the antialiasing (guessing)

Anti-aliasing /should/ have been consistent when transitioning through the portal (though it's possible there's something I missed). The most likely issue you'd encounter is the blending breaking down at glancing angles. More info in this video at 11:25 (AA) and 19:56 (blending).

Loved your work on the game! Made me want to start messing with portals again!

Man this truly is a beautiful game, visually and story-ly. PSI King’s Sensorium made my head hurt like hell though.

(Also, if you’re curious about how the portals work, check out this video youtu.be/w-Z1Fx0LvDc?...)

Are there any features in Unreal 5 that would have changed how you did this had they been available in Unreal 4?

The main thing is that it’s even more expensive now, since a portal needs its own lumen scene. Psychonauts 2 used baked lighting, though.

I had forgotten how clean we got those Ford shard transitions ❤️

Oh, wow! Cool to see such people here :D May I ask what difficulties you faced when you were porting to MacOS? As many people don't port anything I was wondering what serious devs as you are have to deal with to deliver games to fellow apple users

Unfortunately I don’t know too many details about the Mac port (that was handled by ClutchPlay Games, who are fantastic by the way). I know there were definitely a few rendering issues and misc. platform / gameplay bugs that had to be dealt with, though.