So I've got this idea about a character using trid projectors for decieving people. Without any Matrix-Perceptions or AR going on, is there a test for recognizing a trid projection as such? Core Rulebook says: "The hologram can be quite realistic, but unless you’re re-ally artistic about it, it’s pretty obvious that it’s just trid", so if you're doing your stuff right, fooling people, and maybe only for a few moments, should be possible.