Drop a glTF or GLB for the model =>
Drop an HDR or JPG for the skybox =>

To create a seamless poster:
Orient model and resize window to desired size (small is recommended), then click:

Then resize window to any aspect ratio and click:

Click the model to dismiss the poster and interact. To save your poster, click:



To calculate hotspot locations, click:

Then click on the model.
To remove a hotspot, select it, then click: