Toposolid Cut Geometry - windows not cutting

[samanthaL98BX]

I'm working in Revit LT 2025.

I have done a toposolid of the site and been able to excavate the floors successfully, however when I do Cut Geometry to cut in the walls, where the windows are does not cut (see image).

Does anyone know who to fix this?

[msgambelluri]

What you are experiencing is TOPO will not be cut by a window family even if the host wall is cutting the TOPO. so the TOPO will be shown going through the window. This is a rare case to have a window retaining topography behind it. If you really want the window to "cut" the topography then you could create a wall "opening" that is the same size at the window opening and then cut or join the topo with the wall opening. The results are shown below.

[BennieBurger]

This is not really a very elegant solution. In my opinion this is a shortcoming of Revit at the moment with Toposolids.

It does "Cut" Toposolid now, but it's too many extra steps in a workflow that should be simple.