Comparing the graphics via screenshots

[KiriA500]

SE claim it's a "sister engine", which doesn't really quantify how much of its "core" is similar to the luminous engine. However, similar staff members worked on each, and maybe that's why people think that they're closely related. But they're not. A cursory glance at Agnis Philosophy and ARR is enough to prove that. Theyre obviously completely different. I mean it's obvious that since the system requirements for Agnis Philosophy will be so much higher than ARR that the similarities between the two cannot really be that great. Dynamic lighting is nothing exlusive to Luminous, so ARR's engine probably has more in common with its contemporary MMO games with similar system reqs than with Agnis Philosophy and other games made with the real luminous.

You have no clue how a game engine works.

Unreal Engine 3 "Tech Demo": https://www.youtube.com/watch?v=RSXyztq_0uM
Unreal Engine 3 Game: https://www.youtube.com/watch?v=tCw_GKUK7bE

Tech Demos, which Agnis Philosophy is, always show off what the engine is capable of doing. Agnis Philosophy isn't a game, it's a pre-scripted animation running in real-time on a super computer.

A Realm Reborn's engine is just a modified Luminous Tools, which is why it's a "sister engine."