Regarding item 1, here's a useful approach...
In Sumerian, with your HTML3D entity selected, open it for editing in the text editor. Set the entity's HTML code to something like this:
<div id="my-html3d-content">Hello world.</div>
var contentElement = document.getElementById('my-html3d-content'); contentElement.innerText = 'My new content.'; // or .innerHTML
Awesome, thank you!
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