Recently, TextScaled support for RichText was enabled. It works fine; however, when the label is set to size 0 on either axis the text will still be visible on a thin strip (1-2px it looks like)
Hi, thanks for your report! We are looking into fixing rendering the zero size rich text. While there is a side note if you plan to use scaled to animate/dynamically fit rich text into certain area:
Our system has minimum text size limit and for the rich text feature we removed the restriction that it only display the glyph within the bounding area of TextLabel/Button. Which means it renders text at the minimum size with displaying all the out of bounds glyphs when scale-to-fit area is too small. If you still expect only rendering lines within the bound, you could manually check ClipsDescendants on RichText enabled text objects, which should give you same result with scaled non-rich text labels.