Additional fix to get the same output with Tetget 1.4 and 1.5:
https://github.com/brainstorm-tools/brainstorm3/commit/0c4b6527062b186e7c252fd1a83d166982ea40bb
@tmedani @yvonnebuschermoehle
Can you please update Brainstorm and check that now it works correctly with Tetgen 1.5?