Software used recently:
<blockquote>
<div>Openscad
Babylon.js
Threejs
Blender 
FilterForge
und much more</div></blockquote>
<blockquote>
BPBComposer V1.00 released. 
<img src="http://johann.langhofer.net/wp-content/uploads/2017/08/screen4.jpg" alt="screen4" width="1492" height="839" class="alignnone size-full wp-image-546" />
<a href="http://PBRComposer">LiveDemo</a>
<a href="https://github.com/androdlang/PBRComposer">Project on GitHub</a>

<img src="http://johann.langhofer.net/wp-content/uploads/2017/08/screen6.jpg" alt="screen6" width="1996" height="476" class="alignnone size-full wp-image-547" />
src="http://johann.langhofer.net/wp-content/uploads/2017/08/screen10.jpg" alt="screen10" width="2720" height="470" class="alignnone size-full wp-image-549" />
</blockquote>
<blockquote>
The following image was modeled with Blender, textures were generated with FilterForge 6.0 and rendered with Babylon.js (right click for better resolution)
<img src="http://johann.langhofer.net/wp-content/uploads/2017/08/amboss.jpg" alt="amboss" width="1372" height="799" class="alignnone size-full wp-image-531" />

<a href="http://johann.langhofer.net/candle/">Candles realtime simulation with pixi.js </a>
<img class="alignnone size-medium wp-image-509" src="http://johann.langhofer.net/wp-content/uploads/2017/03/screen-300x257.jpg" alt="screen" width="300" height="257" /></blockquote>
<blockquote><a href="http://johann.langhofer.net/escher/mirrorcubes.html">Mirror-Cubes </a>
<img class="alignnone size-medium wp-image-499" src="http://johann.langhofer.net/wp-content/uploads/2016/04/screen-300x207.jpg" alt="screen" width="300" height="207" /></blockquote>
use mouse, wheel and arrow keys to control the camera:
<iframe src="http://johann.langhofer.net/cubes" width="500" height="150"></iframe>
Useful links:
<a href="http://thebookofshaders.com/">the book of shaders</a>
<a href="http://editor.thebookofshaders.com/">EDITOR the book of shaders</a>
<a href="http://www.cdglabs.org/Shadershop/">shadershop</a>
<a href="http://www.iquilezles.org/">!!iquilezles!!</a>