The former king of render engines has been sent to the grave.
Instead, Nvidia will place all rendering-related focus on their API’s and the iRay product (looks like Autodesk made a smart move then when they dumped the engine). Considering that Mental Ray’s development was encumbered by all of the legacy features and techniques created over the years (and it’s declining userbase), it may not be surprising that this is where things wound up.
The end of an era, but we still have a number of ongoing render engines from the turn of the 21st century and before (Vray, Arnold, and Renderman), so not all of rendering’s history is lost.
Sad to see it go, or was it time?