Short Curved Walls and Non Core Layers

At Autodesk Revit forums I saw a post regarding disappearing curved walls. These walls were shorter than the current view range cut plane. When the Wall subcategory Non Core Layers is turned off only these curved short walls disappeared. Other walls of the same type that were straight remained visible. It looks like a bug to me.

In my testing, when the sub-category for Non Core Layers (Detail Level must be Medium or Fine) is turned off the wall will disappear when it's height is not at least 2 feet above the cut plane setting. For example, I can make a wall disappear if it's height is less than 6 feet when the cut plane (view range) is 4 feet. Enter anything 6 feet or higher and the wall reappears. This image is some full height walls and some walls that are 4 feet tall (lighter gray walls).

This is the setting I turned off in Visibility/Graphics.

This is the result, the curved 4 foot tall walls are gone.

I suppose, in their defense, they could argue that the reason it is possible to turn off non core layers is to be able to isolate, only show, the structural portion of walls. As such a curved wall that is not tall enough to reach the cut plane is not likely to also be a structural/bearing wall. At the very least it is unexpected to have a wall disappear only because it is too short and curved.

Cue Randy Newman, "Short walls got no reason..."

Imported or Linked DWG Appearance as Generic Model Broken in 2017

Using Revit 2017, I have a 3D DWG file for some framing that I want to use as a coordination reference within a project file. Initially I linked the file directly to the project but that approach (unfortunately) doesn't respect the cut plane of a plan view which, for example, means cripples above a header show up in the plan view too (header as well).

I decided I'd use the old create an in-place Generic Model family trick.

If you're with me so far you're probably expecting what I expected; to find that Revit regards this imported 3D geometry as generic model (cuttable) category information, giving me the look I wanted. However, when I clicked Finish Model the linked file disappeared entirely.

I thought for a moment, "Am I just imagining that I could do that? I swear Revit used to do this?!?"

Hmm, I decided I'd create a component Generic Model family instead and use Import CAD. This way I could replace the source CAD file if necessary.and just reload the family later...if necessary. Also thinking, "...maybe it'll work this time, this way...?" Nope...

I gave in, I did a quick search using Revit Help and noticed a result called "Regression Revit 2017 - Cutting 3D DWG with section results in inconsistent model display".

NUTS! ...at least I'm not crazy (about this at least)...

Well I'm writing to declare that it's not just an issue in section views. The damn thing doesn't show up in a plan view at ALL.

It works as I remembered in Revit 2016...project is in 2017 though.

I did try creating the family in 2016 and let Revit upgrade it in the 2017 project...no joy...busted. I also created a Specialty Equipment family (in-place too) and it shows up in plan view but since that category doesn't cut...it's missing the point, my reason for traveling this road in the first place.

sigh ... next service pack, update release, patch...(whatever they're going to call...)

Ceiling Plans and Generic Model Families

A bit of inequity exists for Generic Model families. The casework and specialty equipment category have no problem projecting information into a RCP plan as long as some portion of the geometry is "cut" by the view's cut plane. The same family geometry that works for those two categories won't work the same if assigned to the category Generic Model. Seems unfair to me :(