Section fill glitching (again)... or is it me?

I was accustomed to the old issues where section fills would show OK in the model/scenes, but not necessarily in output animations, and back-saving to 2023 was the solution. However, the 2025 version seemed to resolve that. Now I’m using 2026, and I wonder if this new issue is due to the version, or if it’s a “me problem”.

The issue seems to be that a fill is there, but it has some opacity, and seems to be the lilac “back face“ colour, rather than black.

More than that, if the style is switched from “shaded with textures“, to “all the same“, shaded, etc., and even back to “shaded with textures“, then the section fill changes to the usual black, but isn’t retained with the scene. Hopefully the below video shows what I mean.

At a guess you haven’t saved the style for the scene with fill showing.

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This ^^^

All the scenes you switch through for your animation need to have the visibility of the fill turned on and updated.

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A very simple example, scene three doesn’t have fill saved.
GIF 26-11-2025 11-14-51 PM

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There are two scenes/sections, and section fill is ‘on’ and saved in both. There’s only one style, and section fill is ‘on‘ in it. Watch here as I switch the display style, which changes the “already on” section fill, from the lilac, slightly transparent type I mentioned, to the usual black. The display of the section fill reverts though on updating the scene tab and/or updating the style.

Let’s cut to the chase. Share your misbehaving SketchUp file so we can see what you have set up directly.

Done

Test section fill.skp (382.8 KB)

Looks like it is related to sketchy styles and the new graphics engine.I don’t see the issue with normal, non-sketchy edges nor with the Classic graphics engine selected. This is with the classic graphics engine.

I think a bug report is in order.

BTW, are you aware that you have the axes inverted in this file?

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Hopefully this bug will be fixed soon but in the meantime you could use TIGs SectionCutFace extension to create real faces ath the section cut. That will work with the new graphics engine and sketchy styles. You can also apply textures to the section cut faces and use the PBR materials.

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Cheers. I’ll submit that bug report tomorrow.

No, I didn’t realise the axes were flipped, and I won’t have access to SU for nearly 24 hrs; do you know if that’s a factor in the issue… also the origin’s miles from the object, which is also odd.

I don’t think that extension will work for me, i.e. I want the section fill in animations, not single views.

No. It’s not related to the issue. If you didn’t move the axes for this model you should check the template you are using. Fix it if you need to and save as a new template. Also, turn off Length Snapping for your template. That gets in the way of accurate modeling.

I’m not sure where you had the axes when you made the geometry but resetting the axes places their intersection on the origin. It’s a little more than eight and a half meters away. You should keep the model close to the origin but it’s also not related to the section fill thing.

The extension creates actual geometry so I would expect it should work. What are you animating?

Predominantly resi architecture at concept/sketch stage. Typically a walkthrough with flyby/orbit, then introducing section cuts to show each floor plan and maybe a section, e.g. for vaulted ceilings.