Kerbin blueshift at 75km/s?

[Agent86]

So I was approaching reentry in kerbins atmosphere at 75km/s (don't ask) and all of a sudden, it turned light blue.

Anyone else seen this?

PS: I hit the deck at 987m/s, new record. Woo.

Edited December 5, 2013 by Agent86

[Starwhip]

What turned light blue? If there's an image I can't see it.

[Richy teh space man]

Never seen that before, are you usin any mods?

[Agent86]

Never seen that before, are you usin any mods?

Kethane is installed, but not in use. Thats all.

[KvickFlygarn87]

How did you reach 75km/s?

[Agent86]

How did you reach 75km/s?

One tiny probe core, one tiny rockomax engine, and one tiny solar panel. Straight up to 100 000km, then accelerate straight back down. I just wanted to see what happened.

[KvickFlygarn87]

Oh, I see. Never had that. Try without Kethane!

[Agent86]

This time I caught it mid-shift. At 150km/s.

[Starwhip]

What's turning blue?

[Deadpangod3]

Kerbins experiencing an ice age...

[chefsbrian]

Its probably trying to load the atmosphere effects, hence the blue. If your coming in that fast, it probably doesn't have time to even render fully.

[kookoo_gr]

i have seen a similar effect a couple of times with high speed entry angle like yours at my copy and there is one case at danny2462 videos, it's a bug of somesort

[KerbMav]

The effect will be more prominent when coming at Kerbol at even higher speeds for a slingshot, right before attaining the light-speed breakaway factor.

[Wheffle]

...at 75km/s (don't ask)...

You know we have to ask...

That's awesome, though. Looks like you've reach some kind of threshold in the kerbal universe's physics. More SCIENCE is needed!

[Soda Popinski]

The problem with calculating trajectories for the light-speed breakaway factor is fuel usage. Assuming you're not flying an anti-matter powered K'Vort class starship, where fuel mass is negligible, acceleration will no longer be a constant. You'll have to make your "best guess."

Live long and prosper.

[SebLavK]

HarvesteR explained how KSP "moves" the universe around the craft when you're in orbit (I'll post the video if I can find it).

My guess is, like chefsbrian said, that the engine can't keep up with the speed.

My question is, does it stay like that until you hit the ground or does it render properly at some point?

[Agent86]

HarvesteR explained how KSP "moves" the universe around the craft when you're in orbit (I'll post the video if I can find it).

My guess is, like chefsbrian said, that the engine can't keep up with the speed.

My question is, does it stay like that until you hit the ground or does it render properly at some point?

It's a little hard to say, as time from entering atmosphere to hitting the deck is about 2.5 seconds. Reentry effects occur while I'm still seeing blue, but then the camera angle changes and by the time it's swung around, impact at over a km/s. I figure it is a rendering issue, like you've said, as it spreads out and engulfs the planet at about the same speed as my craft is going. It's replicable (With hacked fuel) and I've yet to try it on any other bodies with atmosphere.

[zekes]

someone should try to duplicate it.

[notfruit]

It's just kerbin bracing for impact

[unwisemonk]

No blueshift for me!

[CaptainArchmage]

I do not have any images, but I can confirm that when arriving at Kerbin at a steep angle from a high orbit (above the "full render" altitude), some kind of shadow appears to grow up over the planet, distorting the position and changing the colors somewhat. It does not appear to cause issues with the landing though.

[M5000]

Are you sure it's blueshift? Don't you have to be going quite a bit faster for blueshift to occur?

[SDIR]

It may be a problem with the speed at which you are coming in at, and your computer's ability to render Kerbin as you come in. It's the same thing as trying to hit a target at 2 km/s.

[Tataffe]

Dat Doppler effect

[Kasuha]

I am regularly having a circular Kerbin "inset" of different resolution around 600 km altitude if I approach at high speed. But it's never been blue. I assume the reason is there are two Kerbins inside each other and due to high speed the internal one doesn't keep up and peeks above the surface of the external one. Similarly to how nearby ships shift when using physics time warp.