2.83: how to join cylinders and hollow out the junction

Question

I want to create sewer pipes where a player can walk inside on a 3D game. Then I'm trying to make them by multiple cylinders like this.

Now I have two problems. First, I don't know how to cut A's edge.

The other is how to cut B's side faces.

I tried to do that by boolean modifier, but it didn't work. So will anyone tell me how to do that? Thanks.

Thanks for your reaction, I'm checking the link. – gogogogogo Dec 08 '20 at 06:14 — gogogogogo, Dec 08 '20 at 06:14
https://blender.stackexchange.com/questions/27407 – Duarte Farrajota Ramos Dec 08 '20 at 16:48 — Duarte Farrajota Ramos, Dec 08 '20 at 16:48

score 2 · Accepted Answer · answered Dec 08 '20 at 06:31

2

This particular issue arises in the old boolean solver. The issue is that these shapes are exactly the same size and their points are coplanar. The solver doesn't correctly eliminate all the faces.

2.91 introduced an exact solver that can be activated with a button in the modifier box, it is for these situations.

answered Dec 08 '20 at 06:31

Allen Simpson

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Thanks for the reply, it worked! – gogogogogo Dec 08 '20 at 07:41

2.83: how to join cylinders and hollow out the junction

1 Answers1