Non-Core Layers displaying differently on Roof Plan

[DrakeCanyonArchitecture]

I have two views marked with reference lines and Non Core Layers unchecked in both views. The view on the right is a roof plan, but the wall is displaying as though the outside edges of the materials are the core. The right photo is the floor plan and the walls are displaying as expected with the core only. I don't think this is something that needs a solution or workaround so much, but something that needs to be corrected in the software. I would think that by unchecking the Non Core Layers, the result should be the same regardless of the view. I'm sure it probably has something to do with how the wall is displaying through the roof. The only thing that I have set up to display differently is that I have a filter applied to make the structural walls solid instead of hidden on the Roof Plan.

[RDAOU]

@DrakeCanyonArchitecture 

Attach model to check...

[ToanDN]

Lower the roof plan view range's cut plane so it cut the (parapet?) walls.

[DrakeCanyonArchitecture]

@RDAOU, I created a new file with the exact parts that I used for the screenshots in the original post, the original file is huge. You'll notice some unconventional things going on but it doesn't effect the way the model displays. The roofs in particular are all individual pieces due to the fact that these are production homes with a ton of options, so the model gets disassembled and reassembled based on options selected. Just thought I should explain that that so the odd way of modeling makes a little more sense.

@ToanDN, lowering the cut plane to cut through the wall and reversing the underlay to look up does show the core but changes the way that the rest of the view displays. Which I could correct with some filters or overrides in visibility graphics. I'm not a fan of the way Revit displays a roof plan when cutting through the wall and looking up, it just looks messy and feels clunky to me. Plus the structural elements don't display in hidden line like they do when looking down through the surface of the roof. But, in my mind, if you uncheck the visibility of Non-Core Layers it should show just the core and not the outer edges of the material regardless of the view.

[RDAOU]

@DrakeCanyonArchitecture 

I am not sure what you are seeing wrong in this picture..it is working as expected...

In the Roof view

1. You have set it as Structural View + show Hidden lines by Discipline
2. The Walls in this view being hidden below roof slab are not CUT ie: Wall Layers ARE NOT visible and cannot be toggled
3. Hidden Lines = Boundaries of the wall (All layers included)

Place a Plan region at the wall boundaries and change the cut plane to cut below the roof / ie: to intersect the wall. Now the Layers are cut, visible and can be toggled

[ToanDN]

If you want to keep the original view range cut plane then create plan
regions over the walls and change their cut plane. Or create parts from
the walls, exclude non core layers from parts,band set the view to show
parts.

[DrakeCanyonArchitecture]

The thing here is that since we are dealing with a structural view, in my opinion, we would be seeing the structure and not the materials or outline of materials. The engineers at AutoDesk are obviously very bright and the Non-Core layers thing is new in 2020. Again, in my opinion, it would be easy for them to display just the core in a structural view when Non Core Layers is unchecked. There is never a case where you would pull a dimension from the material to the overhang for instance. It will always be from the core, or structure, to the overhang. In a structural view, all you should see is structure. Just like we have the option to "Extend Roof To Wall Core", there is never a case where you would want it anywhere else in terms of bearing. Thank you @RDAOU for the detailed screencast btw. 

[RDAOU]

You can do that just not by using the non-core layer toggle... that only works if the wall is cut by the ref plane regardless if it is Architectural or Structural.

Anyhow... if there's anything else we can help you with feel free to ask

Cheers

[DrakeCanyonArchitecture]

The unfortunate thing in my circumstance is that as I mentioned, there are a ton of options in these plans so creating a plan region around the walls every time we assemble one of these models would be very cumbersome. This is definitely a flaw in the software in my opinion. It should be easy to correct, just trying to draw some attention to it.

[RDAOU]

The plan region was just for showcasing the issue and highlighting difference between Cut and Projection with respect to non-core layer... If you do not want to work with parts as @ToanDN suggested (+filters to isolate the core), there are still other options to give you same results you are looking for the easiest would be the oldest trick in the Revit book

1.  generate the core layer + structural and load bearing plan from a cut view (ie: level below) - making non-core layers invisible is useful and works in this case
2. Uncheck the visibility of floors, roofs and ceiling in the above plan
3. Override all cut lines to Hidden
4. Overlay both the above plan view and the roof on a sheet

There are other methods using dynamo as well but I have the feeling that the intent of this post is more about you suggesting an idea rather than you having an issue and looking for a solution.

The idea is not bad (allow non-core layers to be toggled when wall is below or above cut plane) but it belongs on the the other Forum Revit Ideas - Autodesk Community

[EBlackburnDMS7X]

4 years later, a similar issue is occurring when low walls are below the cut plane of the floor plan. It doesn't hide the non-core wall layers as expected.

It should...

(New forum topic created)