This is nice, but the article left me unconvinced that you need textures at all. Be it a checker or the drawing on a circuit board, can't you keep everything as vectors, thus avoiding the problem entirely?
Circuit boards have holes, cutouts and import STL/OBJ components that we'll eventually support in this 3d renderer. Assuming we get that far I may have to rename it from "simple-3d-svg"!
I think you'll probably run into performance problems with SVG before you get too far. I can't imagine SVG will perform fluidly with complex circuit boards.
SVG elements are DOM elements after all, and too many DOM elements will cause browser performance issues. I know this the hard way, after adding a few hundred SVG <path> elements with a few hundred <div> elements in a React-based interactive web application, I ended up needing to move to a canvas solution instead, which works amazingly well.
I really hope you have all that figured out, because I don't think it's going to work well using SVG to render complex circuit boards. But maybe your product is only working with very simple circuit boards?