diff --git a/Projected-Light-Patterns.md b/Projected-Light-Patterns.md
index db0ce56..9da9320 100644
--- a/Projected-Light-Patterns.md
+++ b/Projected-Light-Patterns.md
@@ -30,3 +30,5 @@ Now you can start the reconstruction.
 
 Using polarized photos, with unpolarized photos used for texturing with a new PrepareDenseScene node:
 ![combined2](https://user-images.githubusercontent.com/49287303/74112096-bd825d80-4b91-11ea-9483-2a3532c369c5.jpg)
+
+Great advice on the topic can be found here: https://www.reddit.com/r/photogrammetry/comments/n9jlf5/questions_on_using_polarizing_filters/
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