[akdas]

Adding to this, if you imagine the audience is _you_, then you might feel motivated to write the article you _wished_ you had before embarking on your project. That audience falls under your second one ("another retro renderer enthusiast who has similar projects"), but maybe is even more targeted.

One advantage of this is being able to look back on previous projects in the future, as a form of documentation. That helps me pick up on a project I haven't worked on in a bit. True, you don't need to publish the documentation publicly, but since I wrote it, putting it up publicly is almost no effort now that I have a blog.