[QGIS-Developer] QGIS 3D: Support for 3DM (x,y,z,m)

[Martin Dobias]

Hi Jakob

On Fri, Jan 5, 2018 at 2:31 PM, Jakob Lanstorp <jlanstorp at gmail.com> wrote:
> Is it correct that the 3D engine currently does not understand measurement
> values in 3DM format.

M values are ignored as their meaning is application specific. How
would you like to use M values in the 3D view?

> When having four numbers in a coordinate the z (and m) value is skipped
> rendering the geometry af terrain = 0 meter (any 2d layer in 3D map is
> default rendered at z=0).

All visible layers are rendered as a 2D map image for the terrain 3D
entity. Here the Z coordinate is ignored. But if you enable 3D
renderer for your layer, it will create a 3D entity that will respect
Z values. If you do not want your layer to be displayed on the
terrain's texture, you can set layer's symbology to "no symbols" and
that will disable rendering of it in 2D map.

Cheers
Martin