Blender&Archicad - New model instead of updated one

[GiulioMarsano]

Hi @Jedd , first off thank you for the super fast reply!

My bad, by looking at this old video I thought the sync functioning of the element was the same as explained (Rhino geometry to blender).
So only the modified elements were recognised and updated.
In this video as well (revit into blender) its demonstrated how updating does not generate new geometries, and replace the element modified inside revit. That element is the only one that needs the UVs to be set again.

@Jedd

• Send a new Version from Archicad, with some objects changed (not the wall)
• Re-receive the new version, UVs should not have been removed unless the wall was changed in Archicad.

What happens to me is not what I would expect from your explanation:

1. Receive my archicad model in blender
2. UV unwrap walls and stairs
3. Send a new version from archicad with JUST the stairs changed (moved in a different position)
4. Re-receive the new version: what I receive is a full new version of the whole model, no matter if I modified something or not.

@Jedd

When receiving in Blender, the receive will not remove or edit your existing blender geometry. Instead, it will behave similar to a file import, and create new geometry from the received file.

This is what makes me think I did not yet fully understand how does it work.
If I get it, the proper way should be (after point 4):

• delete all the elements of the new collection that already does exist and were not modified
• replace in the old collection (with UVs) the modified elements with those maintained in the new collection.

If so, its better than nothing, but not exactly what I was expecting based on the linked video!

Let me now if I did not get it, and my files are necessary!
Hope I was clear, thank you for your time and for the amazing project!