We have all seen surfaces that are too close together creating a flickering appearance in ARCHICAD and BIMx. The easiest solution is to move element incrementally farther apart until the flicker disappears. With coverings, moving the covering up and away from the roof can create a disassociation between the roof and the covering; meaning the covering will need to be rebuilt with any change in roof design.
There is a solution that keeps the covering associated and eliminates the flicker.
The roof shows an uneven appearance that changes depending on camera angle and movement.
Edit all roof coverings to have a minimum 1/4″ dimension at ‘Allow Space for Framing’
Flicker does not appear with 1/4″ spacing
It is also helpful to note that this setting is not required for all covering configurations. Corrugated metal, for example, does not have the same issue, since it has a natural depth that pulls most of the covering away from the roof. Standing seam or battens have large areas of flat planes that create the flicker, so they may require adjusting the framing thickness setting to get them to show as intended.
If you are using Cadimage Roof Coverings in AC17 you may find it a little tough to figure out where the cover fill settings are located. Like most Cadimage tools, the Coverings tool has a lot of depth, which also means it may not be immediately obvious where the settings are. The first thing you need to do is verify the box for Use Same Pen in Plan and 3D is not checked. This is under the Display Options > 3D + Section tab.
Next Verify that cladding is available to show on each floor option (home story, above, and below). Please note that this does not guarantee that the covering object WILL show on these stories, it just makes options for view settings available for each of the 3 view options.
Lastly you will need to define how the cover fill is represented on each of the three view options. In the third image you will see the options for applying fills to Plan View – Home Story, Above and Below Home Story. If the check box from the first image IS checked (Use the Same Pen…) these options will not be available.
You can save the fill and pen settings set for one of the views and apply them to all three if they need to match, rather than recreating these settings for all view types.
It is also worth mentioning, for those using AC18, the fill type by story location settings are not available; or if they are I have not found where they are relocated to in the new Cadimage Coverings for 18. You can still set the cladding to show or not show in Home, Above and Below, but the fill type by location from the third image seems to be missing or relocated.
Cadimage Coverings Pen Settings
When you need to show what is below your roof and have a Cadimage Covering applied you will need a transparent background pen for the plan view.
Select the covering and open the Selection Settings. Under the Cladding tab go to the view attributes and set the background pen to 0 Transparent. This can be repeated for edge conditions pen settings to create “transparent” flashing, gutters, ridge and barge elements as well.
The result is a fully transparent roof element in floor plan view. This will allow you to view elements below the covering in model space as well as on the sheet with multiple layered plans.