Laser looks all right, when it's dark around. In areas with new lighting, it changes it's appearance with regards to lightsource's direction. Laser changes into weak and transparent line or looks like it's an object with a shadow.
Tested near lamps at the airbase, Agia Marina and Hunter's headlights. All of these lights influenced IR laser's appearance.
Observed in Dev build 0.57.105210 {F19457} {F19458} {F19459}