Because the math is timeless, AI can modernize the asset instantly. This is perhaps the most powerful reason to hunt down the PDF today—not to read the prose, but to feed the raw algorithms into a code interpreter.
If you're looking for a PDF resource on shaders, here are a few options: shaderx6 pdf
Technically, ShaderX6 is under copyright. Charles River Media (original publisher) and later CRC Press hold the rights. While the book is out of print (you cannot buy a new physical copy from Amazon directly), downloading a scanned PDF from a random forum is illegal in most jurisdictions. However, the community is split: many authors of the articles have publicly stated they are happy their work is still read, even via "alternative" channels, provided it is for learning, not commercial republishing. Because the math is timeless, AI can modernize