Currently vue does not create zdepth for atmospheres, this can make it difficult to modify HDRI images and scene composites. In this section of the training, you will learn to quickly modify scenes to create a fast rendering ZDepth pass, with an unlimited amount of cloud layers.

These techniques are compatible with any spectral cloud scene, as well as spherical, panoramic, and standard aspect cameras. Camera may be placed anywhere in the scene, including in cloud layers.
Learn to use lights to cut holes in cloud layers. Setup a color based cloud layer setup, and create a multi-use cloud mask where individual layers are easily extracted and defined.

The cloud mask render pass was added to Vue in version 7.5. If you need more control of the cloud mask output, or you are using a version of Vue between 6 - 7.4, with the knowledge gained from this training, you can gain the benefit of this extremely useful render output.