====== GMA3 ======
===== import mesh =====
  - mesh count max 50
  - tri count max 150k
  - file size max 10mo
  - faces max 35k ?

===== symmetrical phaser =====
source version 1.0.03 : https://www.youtube.com/watch?v=ur13P-IayR8

version 1.9.7.0
  - f 1 t 8 fu
  - tilt 30
  - next step
  - tilt 70
  - phaser left toolbar "move handle"
  - f 5 t 8
  - phaser right toolbar "mirror x"
  - f 1 t 8
  - encoders : "phaser overall" / "phase"
  - 0 t 360 t 0