QGIS 3D view - Flickering and blank white screen with rotating and titling viewport

[qgib]

Author Name: Jeremy Palmer (@palmerj)
Original Redmine Issue: 17529
Affected QGIS version: master
Redmine category:3d
Assignee: Martin Dobias

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See video showing issues on MacOSX running b288a5f: https://youtu.be/OwTXqmJJ5IY

Note the white gaps in the 3D terrain on the tile edges. Also the input layers are WMTS raster layer and a tiled (single band VRT) DEM layer.

[qgib]

Author Name: Jeremy Palmer (@palmerj)

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Layers used in this test were:

1. WMTS layer (https://tiles.maps.linz.io/nz_aerialimagery_basemap/WMTSCapabilities.xml)
2. DEM (few tiles in VRT from https://data.linz.govt.nz/layer/51768-nz-8m-digital-elevation-model-2012/)

[qgib]

Author Name: Martin Dobias (@wonder-sk)

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The gaps between tiles can be hidden by increasing the "skirt height" option in terrain configuration... the skirts are additional vertical walls on the edges of terrain tiles (a technique used in other terrain engines as well).

The flickering you get is something I have not seen before - it looks like all terrain tiles get culled. Could you please check if the flickering goes away if you use a smaller area, e.g. just one tile with DEM instead of using a whole bunch of them through VRT?

[qgib]

Author Name: Jeremy Palmer (@palmerj)

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The gaps between tiles can be hidden by increasing the "skirt height" option in terrain configuration... the skirts are additional vertical walls on the edges of terrain tiles (a technique used in other terrain engines as well).

Thanks changing this to 200 fixed the issue.

The flickering you get is something I have not seen before - it looks like all terrain tiles get culled. Could you please check if the flickering goes away if you use a smaller area, e.g. just one tile with DEM instead of using a whole bunch of them through VRT?

Now I can't replicate the issue! I need to determine the exact steps to get this flickering happening again. Maybe it's only after some time in the application.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Reopen if/when necessary.

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• resolution was changed from to not reproducable
• status_id was changed from Open to Closed