Hi Guys,
We have greatly improved the 2.5d displacement tessellation in the latest v7 daily build.
It should remove a great deal of the artifacts which were caused by the 2.5d displacement. You can find a build here: https://forum.corona-renderer.com/ Corona Renderer 7 for 3ds Max - Daily Builds Changelog #msg182287
I will look forward to your feedback.
@Alex, I tested this with the scene you provided and it is still not perfect but it is much improved. I was able to get even better results by lowering the screen px value a bit. Of course this used more memory, but it still used less memory than the old displacement.
Cheers,
Rowan