Material landscape

Hello community,

I would need help for my landscape representing the Cirque de Cilaos on Reunion Island.

Thanks to the Terraform Pro plugin and the IGN data, the landscape is 100% realistic, unfortunately I can’t find a solution for the mountains to appear as in reality (see youtube video link La Route de Cilaos -N5 from La Rivière to Cilaos - YouTube from 12min 59), I have quite a few packs (brushify, landscape pro3 etc…)