Extruded buildings cover symbols and labels sometimes

[Zverik]

Sometimes extruded buildings cover symbols and labels. Which never happens with MapLibre GL JS (on web) — and that made debugging this quite hard.

I was testing with Flutter package, which uses MapLibre Native for Android. We have also encountered this bug on a native Android application using the SDK.

After some experimenting, I narrowed styles to replicate this to those two:

• style2.json — between zooms 15 and 15.5, poi_r1 layer is covered by building-3d layer. There is no mention of zoom 15.5 in the style, so the reason buildings cover POI on on zoom and don't on others is unknown.
• style2_old.json — same style without building and poi_r7 layers. While it should not have affected the outcome, instead extruded buildings cover POI on all zooms 15+.

When you remove any layers from the label group, suddenly extruded buildings stop covering POI symbols. That is the most baffling: why labels affect this, and why not "all labels".

Versions:

• maplibre_gl flutter package: ^0.20.0
• maplibre-native for android: v11.0.0
• android 14 on sony xperia 10 vi

A screenshot:

See also #2776.

[westnordost]

This might be the same issue as #2259.

[Zverik]

Oh thank you Tobias! It looks indeed the same. Could you please maybe try those styles with the Vulcan build to confirm it is also fixed there?

[westnordost]

I can reproduce this issue with style2_old.json and I can confirm that it is fixed with org.maplibre.gl:android-sdk:11.3.0-vulkan-pre0.

I deduce, my dear Watson, that it is the same issue as #2259. Closing as duplicate.