I did not really create a butt joint there. I just extended one of the walls to certain point. There is no joint between these two walls.
I always used "extend" to join Walls. So this might by why my butted T-Connection did not stick when I move the target Wall. Have to look into that again.
EDIT :
It works already with "Extend". When moving the Wall and updating, the butted T joint stays.
(At least when I select both Walls before I extend, maybe last time I extended to 3D Cursor only ?))
Bonsai provides great tools for exploring an IFC project. I recorded a video covering these features in Bonsai. This may be useful for two types of viewers:
Bonsai beginners
people who would like to use Bonsia as an IFC viewer
Visualizing your IFC model in its geographic context is just one click away in IFClite. The video bellow shows how to achieve that.
IFClite is a free open source web application created by Louis Trümpler. It enables viewing and editing of IFC files. One of its features is one click access to Cesium 3D world context of your IFC project. Of course this only works when your project is correctly georeferenced.
I am experiencing a bit of an Orthogonal Height anomaly with terrain placement (the terrain is bit off). Not sue if it is related to the vertical CRS i am using or whether there is another reason.
Comments
BTW ....
I always used "extend" to join Walls. So this might by why my butted T-Connection did not stick when I move the target Wall. Have to look into that again.
EDIT :
It works already with "Extend". When moving the Wall and updating, the butted T joint stays.
(At least when I select both Walls before I extend, maybe last time I extended to 3D Cursor only ?))
This is what I did in the tutorial. Extend to the 3D Cursor only, not to the wall.
I am not sure what went wrong last time. Today everything works :)
Currently I am quite flashed how good all these Bonsai Modeling Tools work already.
This video explains how to use Bonsai BIM to add georeferencing data to an IFC project.

Bonsai provides great tools for exploring an IFC project. I recorded a video covering these features in Bonsai. This may be useful for two types of viewers:
A new video tutorial shows how to setup and manage IFC project units using Bonsai. Viewers will learn how to:
Use the ConvertLengthUnit patch to convert project to a different unit (proceed with caution)
Visualizing your IFC model in its geographic context is just one click away in IFClite. The video bellow shows how to achieve that.
IFClite is a free open source web application created by Louis Trümpler. It enables viewing and editing of IFC files. One of its features is one click access to Cesium 3D world context of your IFC project. Of course this only works when your project is correctly georeferenced.
I am experiencing a bit of an Orthogonal Height anomaly with terrain placement (the terrain is bit off). Not sue if it is related to the vertical CRS i am using or whether there is another reason.
Check out IFClite here: https://www.ifclite.com/
Absolutely helpful. Great Link.