Exterior Wall Height issue

Hello Pollination team,

I’ve run into this issue a couple times, perhaps it’s happening based on my room height set to 22’-0"…

I’m seeing my trace model exported with walls matching the lecture hall in all exterior walls in labs and offices. See my below screen shot to expore 1612 - Physiology Lab.

For some reason, my roof appears to be be ignored, so even though the 3d model looks like the heights are correct, it’s adding 10 or so feet.

pomf file:
2026-27-1–19-25-49_MPFP_SC-1600 BLDG.pomf (50.6 KB)

trace import xml file:
26005 V2.xml (336.7 KB)

Hope to understand where this issue is coming from.

Thanks,
Josiah

1 Like

Thank you! I will have a look shortly.

Hi @josiahfce,

I admit that I don’t fully understand the issue here from your post but here is my answer based on my best guess.

When Pollination exports the model as TRACEXML it does several simplifications. You can see the full list here. The first item is that all the pitched roofs are translated to horizontal roofs. That is mainly because of the TRACE 3D Plus gbXML importer limitation. This is how your model looks like. The default approach is to keep the extruded volume as close as possible to the original volume.

If you want to keep the geometry the same trying using the gbXML file format instead of TRACEXML.


P.S. I have heard some news and the permission to share it from reliable sources that TRACE 700 is making a comeback! That will justify us rewriting the gbXML exporter to get all the useful information from Revit/Model Editor to TRACE 700. That should save you even more time in the process.

Hi @Mostapha,

This was helpful to clarify some of the differences I was seeing. You answered my question well.
I wonder if it’s possible to let the gbxml exported name the walls more similar to the trace export (I believe @chriswmackey was able to help with that before).

It helps to have External walls and glazing + doors that designers can track better with expected Lengths and heights. Considering that the simplifications keep volume about the same without same roof / wall areas seems to impact heat loads some, due to insulation u-values being different on walls vs roofs.

Thanks for giving the reference on the gbxml viewer, this is something you’ve shown before but now something I will adopt into my check process for clarity.

Cheers,
Josiah

Hi @josiahfce,

In the next release of the Revit plugin, the display names for the faces are much more human-readable. Here is a screenshot of your model exported to Rhino.

I just exported a gbXML which has these clean display names too. That said, I can see that the ID stays the same as what it used to be. Does TRACE 700 use the display name for faces or the identifier?

If it uses the name, then we should be all set. If it uses the ID, then we need to also change the ID. I can see in the TRACEXML model we also set the ID to the human readable name. @chriswmackey, should be able to help with this one.

Here is the new gbXML for your reference.

gbxml-model-with-better-names.xml (477.4 KB)


P.S. I noticed a small mistake in your model which I fixed in this video. It is for this part of the roof. This image is the fixed version.

Here is the recording.

And the updated model.

2026-27-1–19-25-49_MPFP_SC-1600 BLDG.pomf (50.8 KB)

Hey Chris! See the discussion about making the gbXML IDs human readable.