libero51

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 http://libero51.altervista.org/Babylon/FS1950/FS1950.html 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. http://libero51.altervista.org/Babylon/Video/Video_0.flv 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. https://www.babylonjs-playground.com/#J6FMJ#77 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)