Issue description
You might require a view where certain groups of walls, such as the interior walls, need to be turned off, but this can result in small gaps appearing in the exterior walls.
Solution
In Archicad, walls situated on different layers can show gaps when turned off due to several reasons:
Layer Visibility. When certain layers are turned off, the walls on those layers become invisible, potentially creating visual gaps in the model where those walls were previously displayed.
Layers go hand in hand with Layer Combinations, as different layer combinations might be used for various views within your project. If walls are placed on different layers that are not consistently visible together, turning off one of those layers will result in gaps.
To fix the issue:
Select the layer tab at the bottom of the screen.
Locate the layers in question.
To the right of the layer name, you will see the layer intersection value, change the layer intersection value of the wall that has the gaps to a different number, anything from 1 to 99.
Select OK
TIP:
1. If the layer intersection value is set to 0 will stop all connections.
2. The layer intersection value will revert to 0 as you move through Layer Combinations unless you change it for each one.