Masterclass, smoothed out the major bumpies but left a just enough unevenness to remain authentic.
For those that are interested there is a brand new scratch built Kyalami, with the latest layout and longer main straight, in the pipeline for AC.
Don't know when it will be released but you can follow the step by step progress here:
https://assettocorsamods.net/threads/kyalami-2016.1477/