diff --git a/resources/index.html b/resources/index.html
index 4c66dba..9b84f06 100644
--- a/resources/index.html
+++ b/resources/index.html
@@ -80,6 +80,8 @@
## Image-Based Lighting
* [The Definitive Weta Digital Guide to IBL](https://www.fxguide.com/fxfeatured/the-definitive-weta-digital-guide-to-ibl/)
+ ## Camera
+ * [Generalized Perspective Projection](https://web.archive.org/web/20191110002841/http://csc.lsu.edu/~kooima/articles/genperspective/index.html)
# Physically Based Rendering
* [Physically Based Rendering: From Theory To Implementation](https://www.pbr-book.org/)