Target Indicators:
Olfactory (Smell)
- Things made out of synthetic mateials can have a noticeable odor to them. With humans this would obviously require them to be pretty much on top of you to detect it. However animals could pick this up at a signifcant distance.
Tactile (Touch)
- Not really much hear
Auditory (Sound)
- Things made out of stiff synthetic mateials can make an "unnatural sound" as they move or are rubbed up against each other.
Visual (Sight)
– Shape / Shadow / Silhouette / Surface / Spacing / Setting / Color / Movement
- You could have a number of potential issues here. Unnatural shapes, colors, and movement. A lot of synthetic mateials have a sheen or shine to them.
My wife has some fake plants that look pretty good, but they all have at least one or two of the issues above. Synthetic technology has come a long way, so I would never say never, but it is very hard to beat mother nature!
EDIT - I have DQed more than my fair share of snipers in a stalk lane as an observer. Most common issues:
- Speed, which translated to movement, which as humans were are good at detecting when focused
- Foligae, that did not fit the area, the color or shapes were wrong (premade suits from other areas, or bad fake stuff), or they crawled into one type of foliage coverd in foliage that did fit that area.
- Shine/Glint, off of anything reflective
- Unnatural Shapes, why is there a hump/clump where there should not be one? "Tree Cancer"
- Sounds, not real common, but it did happen when someone bumped equipment together, or inadvertently hit an object they did realize was there