Use a 2D Indicator in 3D -
Add 2D interactivity on any 3D surface in three.js with ZIM TextureActive. Visit the TextureActive Studio at https://zimjs.com/studio to see how! ZIM Indicator() can be used to show the number of something like a page number or votes, etc. The fill parameter can be set to true or false. In this example we use the Indicator as an input and have a second TextureActive as well.
See https://zimjs.com/015 for an intro to TextureActives.
ZIM at https://zimjs.com is a JavaScript Canvas Framework - code creativity - visit us at https://forum.zimjs.com for questions and more examples!