How does KSP simulate objects out of focus?

How does KSP simulate objects out of focus? - A Coffee Cup beside a Notepad

I've attempted to perform a controlled aerobraking maneuver against Kerbin upper atmosphere (>55km) when returning from a moon and decided to speed things up with fast-forwarding from the Tracking Station. And when I had my ship circle a few rotations in the 'aerobraking' orbit, I observed that the orbit did not change, despite it should've done so.

I figure that the game does not simulate objects far from player focus properly. Is there a description what and how far from player goes out of proper simulation? A few suspected examples that I've come up with:

  • Eccentric sub-atmospheric orbits
  • Objects on collision course with one another (interaction/destruction/passing through)
  • Science stations in orbit and on land of distant bodies (science generation/energy consumption)

My KSP is the most latest current version - 1.0.4






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Quick Answer about "How does KSP simulate objects out of focus?"

  • Eccentric sub-atmospheric orbits.
  • Objects on collision course with one another (interaction/destruction/passing through)
  • Science stations in orbit and on land of distant bodies (science generation/energy consumption)


  • How do you change focus in KSP?

    You can double click on any planet to bring it into focus, though sometimes you will accidentally switch to a ship or flag on the surface of that planet. Probably easier is to use TAB to go through everything. You can also use shift-tab but watch out. Shift is throttle up!

    What is terrain scatters KSP?

    Terrain ScattersAdds terrain scenery like trees and rocks. Results in a fairly large performance hit when near the ground of any body.



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