1.) Open your 3D Model on PARTcloud.net inside the WEB BROWSER or inside the APP
Download the PARTcloud.net APP
2.) Select the RED CYAN ANAGLYPH MODE and view it with the right glasses
At AMAZON e.g. you can buy one
https://www.amazon.com/Red-blue-Anaglyph-3D-Glasses-game-Extra/dp/B003LWYGPE