NOTE:

"alphaDiscard" works only with "NormalBlending"

There is no z-sorting currently, so, with the "NormalBlending" the transparent pixels are discarded based on a given threshold (alphaDiscard, 0.5 by default).

This technique allows the use the depth buffer with the texts. As a downside, we have little greyed aliased edges sometimes (ex: "Right" over "Front", but not "Front" over "Right")