I've tried different attempts using https://github.com/andreasplesch/aframe-triangleset-component but I get this from the Mount Fuji 256 data:

Which doesn't look to me like the input image:

Mainly because of the pointy spikes.
I'm using
<a-triangleset projectdir="z" material="roughness: 0.2; metalness: 0.3; color: green" rotation="90" position="-60 -100 30" scale="1 1 1" :vertices="this.vertices" :triangles="this.triangles"></a-triangleset>

Where this.vertices and this.triangles come from a Vue component that uses the data from tile.getMesh(80) to make these attribute data.

Please advise what am I doing wrong?
Thanks for your guidance.