Seems like “Font Alpha” is not taken into account for the resulting pixels. rgb is matching correctly, but no alpha.
I was just writing this one up when I peeped this at the bottom of the Suggested Topics.
text scalable_edge.toe (14.7 KB)
TOP to CHOP shows that the scalable textTOP has zeros written in alpha. According to the documentation, it should be switching to Scaleable when pt size is greater then 16; if this is actually happening, then the alpha is fine in this mode, but when set to scaleable its not there.