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KorniliaP
Contributor

Corners intersections

Hi everyone,

 

I’m running into an issue with composite wall intersections and I can’t figure out what’s causing the inconsistency.

I have two corners with what should be identical settings:

  • Same composite structure
  • Same building materials
  • Same material intersection priorities
  • Same layer order

However, when the walls intersect:

  • In left corner, the junction behaves as expected
  • In right corner, the concrete layer extends all the way to the exterior, overriding the finish layer

Στιγμιότυπο οθόνης 2026-04-20 105436.jpg

 

This happens even though both corners appear to be set up exactly the same.

Has anyone experienced something similar?

 

Any ideas on what I might be missing would be really helpful.

Thanks in advance!

 

Operating system used: Windows 11

Setup info provided by author
5 Replies 5
CosminF
Advisor

Do you have other elements that might intersect the corner on the right? 

If you replicate the same situation elsewhere, does it show up properly?

Cosmin Furdui - architect @ Wincon
AC 27, running on Windows 11 Intel(R) Core(TM) i7-14700K CPU64, 3.40GHz, 32GB RAM, Nvidia GeForce RTX5060 32GB
runxel
Moderator

Not easy to tell from the screenshot alone.

But – shot in the dark here – check if there are some elements doubled (e.g. accidentally copied in place). It will not be obvious from the plan (other than these weird connections happening).

Lucas Becker | AC 29 on Mac (Sequoia) | Graphisoft Insider Panelist | Akroter.io – high-end GDL objects | Author of Runxel's Archicad Wiki | Editor at SelfGDL | Developer of the GDL plugin for Sublime Text

My List of AC shortcomings & bugs | I Will Piledrive You If You Mention AI Again |

POSIWID – The Purpose Of a System Is What It Does /// «Furthermore, I consider that Carth... yearly releases must be destroyed»
Laurentiu
Advocate

Are the small gray corners made of walls as well? having walls on walls might cause this kind of issue.

Or it could be a height difference or something to do with the reference lines of the smaller gray corner.

Laurentiu Cauni | Architect | AC 17-28 INT
Windows for AC & iOS for BIMx
Lingwisyer
Guru

Following from Cosmin, said elements need only overlap in 3D with their reference lines crossing regardless of their visibility on the current storey. If it resolves when you move the elements in question off to the side, then examine the 3D relations.

 

Ling.

AC22-29 AUS 3200Help Those Help You - Add a Signature
Self-taught, bend it till it breaksCreating a Thread
Win11 | i9 10850K | 64GB | RX6600 Win11 | R5 2600 | 16GB | GTX1660
JeffH
Expert

90% of our corner cleanup issues seem to be due to this exact issue.  That's usually the first thing to check.

AC24 / AC26 / AC27
Win10

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