[QGIS-Developer] QGIS 3D: Fails with large DTM image

Martin Dobias wonder.sk at gmail.com
Fri Dec 15 13:22:03 PST 2017

Hi Calvin

Could you please point me to such a DEM to try it out myself? Or even
better, file a ticket on issues.qgis.org so that we do not forget
about it. Not sure from the top of my head what could go wrong there -
the raster size should not be the reason really as the raster data
access is using the same code paths as 2D rendering would. Maybe there
is something in the data that causes the problem. If you resize the
large DEM to e.g. 5000x5000 pixels, does that help?


On Fri, Dec 15, 2017 at 8:38 PM, C Hamilton <adenaculture at gmail.com> wrote:
> QGIS 3D has a lot of potential and works well with small DEM data sets, but
> when ever I try it with a large DTM image I just get a white screen. I tend
> to work with large DEMs (50000 x 50000 pixels and larger) and I would love
> for this to work with it properly.
> Do you have any ideas why this is the case? I have tried this with an
> AIG/Arc/Info Binary Grid image as well as a GeoTIFF with overviews.
> OS: Windows 7; QGIS 3 Version: 2.99.0-238
> Thanks,
> Calvin
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