I want to make a pipe like the picture.
But I’m stuck with a few problems…
- 
I don’t know how to draw this empty space… I don’t know how…
 - 
I want to use CSG to draw the shape of the pipe as shown in the picture, but when I run the subtract part, the Babylon stops…
 - 
Finally, I want to create a function that embodies bent pipes depending on the angle
 
Is there anyone like a hero who can help me build my function?(┬┬﹏┬┬)
PlayGround : https://playground.babylonjs.com/#PDRDFA#49
