Chetal Gazdar covers the process of creating environmental reflection using a normal pass in Nuke.

Environmental reflections in compositing have a few core fundamental concepts that will be true, no matter your tools. Covering these concepts while showing how to reflect the Nuke’s environment is Chetal Gazdar’s latest tutorial.

UV Pass as a Component.

Gazdar covers exactly a UV pass and why it is so vital in the compositing process for specific tasks.

A UV Pass is one that coverts the UV values of an object in the scene into two simple channel values. It creates a rasterized version of the UV space. This type of pass is helpful when you need to replace textures after the render has already happened. 

A Standard Normal Pass.

A UV Pass is only one part of the elements you need to reflect the environment in Nuke. The other is a Normal Pass. Chetal covers the finer details of the normal pass and how it will affect this type of workflow in compositing.

There is a lot of info in this tutorial, along with a lot of foundational stuff that makes it a fantastic resource for all types of compositing apps.