They can also travel along a standard power transfer beam, and leave traces of anaphasic radiation in their wake. When bonded to a Human, the host's appearance may change, such as a change in the eye color.
The anaphasic lifeform was a computer generated effect (CGI), using for the first time in televised Star Trek the LightWave 3D software (at the time still the software component of the Amiga Video Toaster Suite package), provided by Digital Magic's Joe Conti and Tim McHugh. It was a conscious effort to gain more creative control in contrast to the traditional use of liquid nitrogen against black velvet, called by VFX supervisor David Stipes, "an act of God", due to the fact that once employed, getting a good useable shot, using this method, was very much a draw of the luck.(Star Trek: The Next Generation Companion, p. 281) Digital Magic continued to experiment with LightWave 3D software in the remainder of the series, creating amongst others the plasma stream in the later episode "Eye of the Beholder".