[QGIS-Developer] QGis 3D performance

[Martin Dobias]

Hi Vincent

On Fri, Jan 5, 2018 at 4:39 PM, Vincent Habchi <vince at macports.org> wrote:
>
> When I display a 3D view on OS X / Qt 5.10 with a reasonably recent MacBook Pro 13" (i5-5257U CPU - integrated graphics), even when I don’t interact with the view, the fan ramps up and top reports a CPU usage around 50% for QGis. Other applications slow down perceptibly.
>
> In my experiment, I use a 25x25 m DEM as terrain model and display around 40,000 3D vector features (extruded buildings models).
>
> Is this CPU load expected? Do you get a similar phenomenon on your own hardware?

Yes it is a known issue: https://issues.qgis.org/issues/17493

Cheers
Martin