In 2016, I needed to figure out how to render text in WebVR for WITHIN's WebVR site. Because WebVR relies on a canvas element, text rendering must be done in canvas, in the 3D scene. I spent some time researching and evaluating different text rendering methods, and found that signed distance field bitmap fonts are the most effective and efficient way to render arbitrary blocks of text in WebVR. So I created a bitmap font with Hiero (.fnt and .png), browserified Matt DesLauriers' three-bmfont-text and converted my .fnt files to .json to remove the load-bmfont and Node dependencies, then wrote a convenience wrapper to handle the creation of text objects with the .png and .json assets:
In February 2017, I wrote an article that was published on Google's developer blog documenting and explaining how to generate a bitmap font with Hiero and how to use the font in Three.js with my wrapper. My example on GitHub demonstrates the typography capabilities of layout-bmfont-text with the dat.gui sliders and includes a bitmap version of Roboto that you can use in your own projects. My usage has changed a bit since the Google dev blog article was written.