I installed the Spin 360 deg and 3D Model Viewer plugin and had an issue with how the model was being displayed. I contacted the plugin author Maurice and he responded quickly with a solution. It turned out my mtl file was still referencing the file path from my PC so none of the textures were loading (if anyone else has an issue with texture files not showing, check your mtl file).
The plugin is simple and straightforward yet powerful under the hood. You can customise functionality with shortcodes and it embeds well on a WordPress website.
I give this app and it's author five stars and look forward to using it on my websites, thank you Maurice! 🙂