Redshift Consulting, Inc. 650 Castro St., Suite 120-526 Mountain View, CA 94041 In the case of light waves, this is called redshift. As an object moves towards us, sound and light waves are bunched up, so the pitch of the sound is higher, and light waves are moved towards the blue end of the electromagnetic spectrum, where light has a shorter wavelength. In the case of light waves, this is called blueshift. Aug 19, 2015 · On the electromagnetic spectrum, red light has a low frequency, and blue light has a high frequency. So when light is moving away from us, it's shifting toward the red end of the spectrum. If it's moving toward us, it's shifting toward blue. Now, what's the cosmological stuff have to do with it? It's simply showing redshift on a big, big stage. Redshift Sprite Node - CG Quick Tips #2. In this CG Quick Tip tutorial we take a look at how to use the Redshift sprite node with alpha/opacity maps to create foliage such as leaves and grass.