The graphics of Revelation Online is mediocre

Graphics are important! Who would play if your loli does not look good right?

Now, this overhaul is not probable. RO is technologically not breaking game. It is 32-bit DX9 engine that could have been made 10+ years ago. Visuals the same, they are cca 2006-8 standard. Well at least it runs good.

It runs good for one reason. The number of polygons on the screen is low. The models are low-poly and there is also aggressive LOD system. So the number of drawcalls is low enough that the old API can process it and as a result it is runnable even on very old machines. If they would just increase the poly count to the level visible on that video (the textures do not matter they will just consume more RAM/Vram), the current engine would fail misserably and it would turn to slideshow when many people are on the screen (look at Tera, Bns, Bless, they run in to this exactly same issue of having high poly characters in outdated engine).

It is possible to render that smooth, but they would have to move to DX12 Or OpenGL Vulkan API. And that is very unlikely, cause it would mean jump from old tech not to previous or current one, but future one (as no mmo so far utilities those API's). And at the same time the old render would still have to be present as choice (+ details reductions) so the people with weaker HW would still be able to play. Ihmo too much dev time I think.

If they should focus on improving something its the fluidity of animations, combat system improvements (drop this apprentice of 3 master of 0 system), and fix the pvp/flagging system. If they do that the game would explode way more than the graphics overhaul. Cause the current graphics will not kill the game, they are good enough, but the Revelation Online Gythil(main currency in game) seller like R4PG will kill this game in future!