Here's a new feature I'm really excited about : the
visibility / stealth system. Detecting enemy ships is done by scanning for
electromagnetic radiations with active or passive sensors. The active sensors
emit EM radiations in the hope it will bounce on enemy ship back to the sensor,
effectively detecting ships but also decreasing your own stealth as it emit
radiations. Passive sensors detect radiations emitted or reflected by the enemy
ships without emitting radiation itself. This one highly depends on the target
own emissions and it's reflection of the nearby star emissions.
Also, some range of the EM spectrum have more specific
usages. Radio wave, infrared and light radiations are mostly similar. But X-ray
can detect ships hiding in dust clouds and Gamma-ray detects ship warp in/out.
When a unit fires or warps it will emit additional radiations, that kind of
actions usually result in being detected.
But the ultimate in scanners are the neutrino sensors.
Neutrinos are weakly interacting particles emitted by most ship reactors.
Meaning they tend to go through everything, making them great for scanning
through asteroids field or high density dust cloud. However the same property
that makes them so efficient also cause the detector to be quite huge as the
particles don't interact much with it. Thus you will need a huge ship to carry
one such detector in your fleet.
So if you want to go on a stealth mission, use passive
detectors, low emitting reactors and paint your ship black like a ninja!
And finally, here's a preview of what the fog of war will
look like. The bright bubbles are regions covered by your ships' sensors.