Importing 16 bit Height Map not working

Hi all,

Using 2019.2.11f1
I have two issues;

Firstly, I cannot import a 16bit Height Map - it only allows 8bit to actually import ...? Am I missing something in project settings that has to be checked in advance?

Secondly, I am using a large single 4096x4096 terrain and it doesn't matter how I fiddle about with the Terrain Settings between instanced/not instanced, pixel error etc, I cannot stop the terrain from 'morphing' in play ...

I'm now wondering if issue one is directly affecting issue two ...?

Any help appreciated
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Have you solved this?

 

The "morphing" can be caused by terrain settings (resolution, pixel error, etc.) or terrain instancing. (off the top of my head). I dont think this is realy an import problem, as ive seen it before in my own projects, just cant remember how i solved it...