Hi, I have just joined this forum,
I am an elderly railway technician and for about a year I have been trying to familiarize myself with babylon to build my virtual railway model
The question of tunnels, or holes in the dynamic terrain, has been solved for now with tricks that involve discrete complications of the code and its readability.
Alternatively I was able to create holes in the dynamic terrain using the property hasVertexAlpha = true, but in this way the depth sorting of the bumps is not done correctly.
double click on the terrain ....
I was unable to access the vertices of the triangular faces for changes or deletions.
(this text has been translated from Italian)