You can reload and export them inside Blender (free) 
Just go there!
Then you can have any formats so OBJ for use it inside ZBrush!
Have fun modeling! 
For advanced young brains! 
(free of course!)
[video=youtube_share;WVv5OAR4Nik]https://youtu.be/WVv5OAR4Nik[/video]
SimLAB Composer Lite
Free of Course Real Time or Not: max(1920 *1080)
Can reload quasi any 3D Formats!
Very useful when you have differents objects from different programs!
You can use this free version for commercial use!
here Lite 7 but it’s the same for the Lite 9
…inside SketchUp 2017 Make (free)
A free PBR* render directly inside free SketchUp Make 2017
- Physically-Based Rendering (PBR)
Carreful, you must intall 2 .rbz files :
https://github.com/SamuelTS/SketchUp-PBR-Plugin (2 gigas because there is a Library of material added to the native SketchUp one)
&
https://extensions.sketchup.com/fr/content/gltf-exporter
You can edit material properties etc…
Crazzy thing! Very nice rendering real time (not like these video ultra compressed 
[video=youtube_share;dumVi67PVTo]https://youtu.be/dumVi67PVTo[/video]
Following images by Sam the creator of the PBR for SketchUp!
Attachments
For the page 100 a little big gift!
https://www.sjeng.org/leela.html
With Deep Learning technology!
Put Tools / “Show Network Probabilities”
Zephyr 4 (free max 50 images : very sufficient for play with it)
https://www.3dflow.net/3df-zephyr-free/
[video=youtube_share;uclan46KMZI]https://youtu.be/uclan46KMZI[/video]
The new version of Meshmolder is now available for download. Take advantage of the new implemented tools and give your feedback to me. The Uniform tool has been completely optimized to look more like Sculptris and Zbrush. The “All Uniform” tool is perfect for use as Dynamesh, but at the level of triangular faces. “Grid View” now has all three axes. Fully altered menu bar to facilitate the modeling process. New texture mapping tool still in the process of optimization and should be improved in the next version. Download Meshmolder now and help with its development.
http://www.meshmolder.com
https://alicevision.github.io/#meshroom
[video=youtube_share;v_O6tYKQEBA]http://youtu.be/v_O6tYKQEBA[/video]
Free for create one single player game with no cloud connectivity!
You can also with it use in Free : Speed Tree!
https://aws.amazon.com/lumberyard/faq/
[video=youtube_share;2g06nPgnWsQ]https://youtu.be/2g06nPgnWsQ[/video]
https://store.speedtree.com/speedtree-for-lumberyard/
The SpeedTree only free for Lumberyard above!
[video=youtube_share;3GD7-ZUFx2s]https://youtu.be/3GD7-ZUFx2s[/video]
A new concept : you code directly in your web browser!
The site : https://p5js.org/
The Editor : https://editor.p5js.org/
Have fun!
Take the train! 
[video=youtube_share;yPWkPOfnGsw]https://youtu.be/yPWkPOfnGsw[/video]
so my try
in full screen: https://editor.p5js.org/full/rJX8zSXO7
Embeded don’t work here
<iframe width="730" height="410" src="https://editor.p5js.org/embed/rJX8zSXO7"></iframe>
Sorry i have forgotten to put the code!
https://editor.p5js.org/Pilou/sketches/rJX8zSXO7
You can modify it see directly the result and save it if you are registered (free)
or even save it on your computer by a simple Ctrl + C, Ctrl + V of the selected code inside NodePad+ for example!
Nice! Thanks Pilou! 