ACES on playcanvas

Hello every one,
We were used playcanvas to create some contents, and when we try to use the aces setting cubemap, it doesn’t look the same as nuke, maya or other CG effect.



I asked support why be this result, they sent two links to me:

On first link I found this curve

It’s not like any ASEC curve.

Who can tell me what this ASEC did?