What you said was clear and still 100% wrong.
- The last time Epic created a demonstration for UE4 it was released many years after it was first shown at GDC. WRONG (The last demo was the kite demo which was released 3 months after GDC)
- and instructions on how to fix it WRONG (Nothing were ever wrong with any of the demos. Nothing to fix. They worked out of the box and still do.)
- and instructions to build it for the latest version of UE4 WRONG (Not only do you not have to build the demos. All updates to the latest version are done by Epic the very same day a new version of UE4 releases. )
WRONG. The only demo that came out a year later was the infiltrator demo and that was a year after UE4 first launched publicly.
WRONG. UE4 was publicly released March 2014. Elemental Demo was available on release. Day one.
Again exactly 1 year after engine public release.
Nope you dont and i just proved it. Like I won't be here trying to tell you things about Unity and their engine.
I have only used unity once to run the book of the dead demo. I don't develop on it. I definitely won't pretend on an internet forum that i have any clue about unity, its status and history.
Lumen Already exists in UE4. Going all the way back to 4.8 (2015).
Lumen is a combination of currently existing tech (with improvements ofcourse) in UE4 called Distance Field GI, HeightField GI and SSGI. The only difference is now they brought back SVOGI from the dead and mixed it in.
The nextgen systems are just now powerfully enough for them to refocus on it and mixed them into one system (lumen). But the features already exist in the engine other than SVOGI. Development just wasn't focused on them till 2 years ago. Fortnight money changed everything. Epic games went on a hiring spree for the rendering team.
Heightfield GI
This demo uses heightfield GI only (already in engine since 2015)
Distance Field GI (already in engine since 2015)
SSGI (already in engine since 2019)
The killed SVOGI because PS4/XO wasn't powerful enough. Now its being resurrected (removed from engine in 2012 before release)
The engine wasn't public till March 2014 and the Elemental demo was released on launch day. What Epic games did was unprecedented, releasing assets and source code of practically everything. including their own developed games later (paragon). No one wanted Elemental demo because the entire concept of getting assets and source code is unprecedented.