[author] Thanks for reposting this! It was a small but cool learning that all perspective correction needs is dividing screen-space barycentrics by vertex depth

[author] Thanks for reposting this! It was a small but cool learning that all perspective correction needs is dividing screen-space barycentrics by vertex depths and normalizing. I wanted to share my understanding of the math. 3D graphics is a rich and old field with lots of tricks like this. It's cool to see faster algorithms and alternative explanations in the comments!