Hi
I'm trying to export a DGN to IFC with some modifications to the elements colours. I found this thread on the subject:https://communities.bentley.com/products/building/building_analysis___design/f/aecosim-speedikon-forum/217732/maintaining-materials-colours-when-exporting-dgn-to-ifc/667233#667233
Alifur Mandal says that "Till now, if we export a dgn file to IFC, only wireframe colors will be visible in the IFC. None of the material color will be visible in the IFC. If in DGN file, in the wireframe mode it is red, the IFC material color will be red, if it would be green in dgn wireframe then it will be green in the IFC file"
In my DGN i have level override on and set to display certain levels to red:
But they are exported as green anyway (The levels original colour):
So, is there any other way to change the colour of an IFC-element without changing the levels colour?
Robert
Hello Robert,
The community thread you are referring is an older thread when there was no support for material color to export to IFC so by default takes the color from Parts. Now after Update 9, OBD is able to export material colors to IFC. Please see the below image. The textures are not being exported to IFC yet.
Regards,Alifur
Ok, so that is solved.
Although, I just wanted to export to IFC with my level override colours, or change the colors some other way. As the case was in the other tread, I'm not after the material colour. I only saw your comment that IFC is exported as it looks like in wireframe, but I didn't get that to work.
So, is there another way to change the colours?
In my experience it also depends on the type of IFC export. I once made a comparison of the same model exported as IFC2x3 CV2.0, IFC4 RV and IFC4 DTV (from left to right in the picture below). As you'll see the colours are not always exported in the same way. This was done in U9 when it just came out:
Alifur Mandal said:I hope this is what you want as an outcome.
No, not really. The projects BIM-manager wanted different colours depending on type of builing-elements (beams, columns, wall).
Johan De Cock said:In my experience it also depends on the type of IFC export
How does it look in your dgn?
Like this in "Filled hidden line" without geometry maps:
It resembles the IFC2x3 export closest.
Below a screenshot (from an IFC viewer) of one of my "real" projects, exported as IFC4 RV. This is only the structural model, not architectural elements:
Colours of the elements correspond to the level colours (no colour overrides) in OBD. I think this would be what you need, no?
We have a different setup here. All existing elements levels are green. And all new elements are coloured based on material (grey for concrete, red for steel etc.) (we are structural engineers so that suits us well in normal cases). But now and only for this IFC-export I would like to override the levels colour and set it to something based on element type. I tried level override, and displaystyle with some display rules. It looks great in my model, but the IFC is still based completely on level.
Sounds like the recent added feature in MS U17 Convert Display Rules to DWG | MicroStation Ideas Portal (aha.io)
Maybe you could post a similar idea "Convert Display Rules to IFC" in the OpenBuildings Designer Ideas Portal (aha.io)