Atelier Rorona Plus The Alchemist of Arland [BLES02050]

It is kd-11. And you can use the latest RPCS3 version now, those changes have since long been merged into master branch.

so if i get it right... the latest build that you mean is this (april 12)
https://ci.appveyor.com/project/rpcs3/rp.../artifacts

it already has the k-11 merged and all i have to do to try to make trails work is to use that build and check GPU texture scaling? of course i assume that i still have to follow everything else you thought me: the sandy bridge, the check all modules, and the firmware from sony, ... right?

i think i tried that but i'm still getting an error. if this is confirmed then i'll try again and then attach the log. vulcan and d2d... whatever, and i should use both recompilers?

That version yes. Both recompilers, sandy bridge workaround, gpu texture scaling... Same as Atelier Rorona here except for the sandy bridge workaround really. Move over to that thread for further questions.