Heightmap import crashes game

Hey all,

I've been trying to make a custom map and wanted to import a heightmap of real data to create the elevation in the terrain. However, upon importing the heightmap the game crashes.

Looking to use a 2048x2048 size map/heightmap. I think I've converted everything correctly but could be making a mistake here. I created the heightmap using an 8x render via https://tangrams.github.io/heightmapper/#13.04167/45.4611/7.1670
Then I used paint.net to get a 2048x2048 slice of this map.

Upon importing the heightmap I only select it and don't change any other settings as there is no clear tutorial explaining what to change in order to make it work.

Tutorial I used to create the map files:

Heightmap image used:


All help is much appreciated, hoping to get started on this project soon

 

did you find any solutions? it also like to crash for no apparent reason when importing terrain materials