3D vizualization in QGIS with three.js javascript library

With the Qgis2threejs plugin you can export DEM-data and vector data to html/javascript and look at the result in a web browser.

https://github.com/minorua/Qgis2threejs/wiki

Here is a little example with a forest-DSM, vector building polygons with a height attribute, an orthophoto and a terrain model: 

Input data:

Forest DEM:

Buildings with a height attribute:

Orthophoto:

DTM:

Add the layers that you want to export and zoom in to an area. Then push the threejs-button.
All layers above in QGIS:

Threejs:

The threejs-button: 

To add the button to QGIS you have to click Plugins --> Manage and install plugins... and scroll to the Qgis2threejs plugin.

Used parameters in my example:

You can use the Vertical exaggeration-parameter to exaggerate the heights in the DEM:s:

Select a DTM layer that is representing the ground:

You can add additional DEM:s:

I used a height attribute for the buildings:

The result viewed in Google Chrome:

The result with a map as background instead of an orthophoto: 

More info about threejs:
https://github.com/minorua/Qgis2threejs