[QGIS-Developer] QGIS 3D: looking below the terrain model

Andreas Neumann a.neumann at carto.net
Wed Dec 13 23:02:16 PST 2017

Hi Nyall, 

nice that we agree on both ;-) 

I will start collecting a wish-list on 3D and we can do a crowd funding
to address selected issues. Or we could do another QGIS grant on 3D


On 2017-12-13 23:06, Nyall Dawson wrote:

> On 14 December 2017 at 00:31, Andreas Neumann <a.neumann at carto.net> wrote:
>> However, one issue I have is that the terrain rendering disappears when I
>> look below the terrain model surface - which isn't so nice for a caver or
>> geologist. Is this also an issue about culling? Would it be possible to
>> enable the rendering of the backside of the terrain surface?
> I agree that this is desirable. Geotechs will also very quickly be
> demanding this feature in order to visualise boreholes correctly!
>> The other issue I have is that tilting is somehow locked at the horizon. I
>> can look down on the terrain and then rotate the whole model until I look
>> sideway into the model, but than the rotation is blocked. I cannot rotate
>> any further so that my camera gets below the surface and that I could move
>> below the surface and look up towards the terrain. I guess this makes a lot
>> of sense for people who do not need to explore things below the terrain
>> surface, but for geologists or cavers, it would be great if this
>> rotation/tilting blocking could be disabled somehow.
> I'd suggest this should be an option in the 3d view configuration. I
> agree it's a valid use case, but for most users it may be unwanted.
> Nyall
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