I have a project in which I wish to use a copyrighted font but will use said font in a manner which I believe to be a derivative work. The glyphs themselves will be converted to paths, then I will perform an operation which will entail placing the text inside of a box, and then creating shapes which represent the negative space of the glyphs, and then the orignal glyphs will be completely deleted. While this project will not be for the promotion of any particular brand or advertising any particular product (other than my name, essentially), I may intend to sell copies of this as an art poster. Would this be considered a derivative work or would this require a license in order to sell copies of this poster?
Additionally, the information I've been able to find on derivative works in context to fonts and typefaces is unfortunately vague, and I would like to open this question up not just to the confines of my personal query but to help others outline the scope of what is a "derivative work" in regards to a font/typeface.