Anti-Gravity Mun Spot???

[SelectHalfling0]

BTW I am posting this not because I'm reporting the bug, but because I want to know if this happens to other people.

So today, I continued my exploration of the Mun with my standard "Mun Explorer" class rover. It is well tested and is extremely reliable.

Then, at 20 m/s, I put on the brakes, and went to eat lunch. I came back and the rover had parked smoothly (as it usually does) and I let brave Hadfen go on an EVA. Everything was also normal, and he returned to the rover after getting some pics of Kerbin. After turning off the brakes though, something strange happened. The rover was on a 10 degree drop, pointing down, however it was backing up at increasingly fast speeds!!! I performed a feat of anti-gravity!!! After wrestling with the rover I managed to start rolling in the right direction of gravity, and when I reached the halfway point down the hill, gravity was back to normal. After more tests I found the entire upper area of the hill was anti-gravity. I even restarted the game, but still the same results. Anyone else encounter things like this?

Video of anti gravity hill coming soon.

[panfish5]

Do you have coordinates of the anti gravity hill?

[7499275]

Sounds interesting, would like to see a video as you mentioned and also the coords to test for myself.

[Wooks]

In my journey around Kerbin on a rover I've found many hills and mountains that behave like that, mostly on abrupt terrains. The nearest one to the KSC (and the first one I encountered) is due north, you can pinpoint its location on episode 4 of my series.

[SelectHalfling0]

So I finally managed to find the spot again (I had continued the roving for some time after)

Coords:

2 degrees 26' 42" North

95 degrees 44' 32" West

Video:

My Scientists are currently calling it "Magic".

[GoSlash27]

I've encountered this on Kerbin and Eve. Slope changes don't seem to behave intuitively.

Best,

-Slashy

[Geschosskopf]

I 1st encountered this weirdness (which in my universe is humbly called the "Geschosskopf Effect") back in 0.22 or whenever it was Kerbin and Mun got their last major facelifts. It's very easy to find on Mun; just look anywhere that the rims of 2 overlapping craters intersect. Approach the area from outside the craters so you're driving up the rim towards where they intersect. The effect will kick in as you near the crest, pulling you in the direction of the rim intersection on the opposite side of the 2 craters.

But in general, you can find this anywhere near where a steep upslope suddenly meets a steep downslope. My favorite is the small, spike-shaped island next to Airbase Island. Built a VTOL or STOL plane, land it on the north slope near the peak, and watch it roll up to the peak by itself .

The interesting thing about this effect is that it only affects wheels. Kerbals, flags, ships on legs instead of wheels, and planes sitting on their bellies with wheels retracted do not move.

[EpicRootHairCell]

phenomenon like this have been reported irl but have always been the result of a optical illusion making the downwards sloop look like it is actually going up. In this case i would presume it is a result of a bug in the terrain.

[Tw1]

phenomenon like this have been reported irl but have always been the result of a optical illusion making the downwards sloop look like it is actually going up. In this case i would presume it is a result of a bug in the terrain.

I to have experienced the bug, while exploring around the Mun's South Pole. I also initially presumed it was this, like those "haunted" or "Magic" hills you hear about. But my navball reading also said I was going up....

[Kasuha]

I found such parts of terrain when exploring Duna poles. They seem to be most often next to a cliff, pulling the rover towards the cliff and throwing it down there. Almost as if you're already on the slope of that cliff, it may be very hard to get the rover the other direction and often it is only possible to steer it along the cliff edge.

Almost as if the "gravity action" uses lower terrain subdivision than the graphics card.

[xcorps]

Time for a GRAIL mission!

[NoPanShabuShabu]

I also saw this effect on Eve. I think it's because of mismatch between the terrain collision mesh and the rendered surface and how the wheels react to these. I believe it's the same effect as what can make your rover wheels get stuck in nothing, break them, make your rover go flying, kill everybody, etc.

[SkyRender]

This seems to be a side-effect of how the current stock rover wheel code works, actually. There's something transposed somewhere, that's for sure, as multiple users have tested and confirmed that the stock wheels will practically soar up highly-inclined planes, and struggle like they're on the steepest hill imaginable on a nearly-flat plane.

[Kerba Fett]

I've also seen weird things with rovers on the Mun north of the east farside crater. When nearing the rim of smaller craters I kept rolling up the hill then down into the crater. I saw this with a few of the smaller (when seen from orbit) craters.

Even the navball and Mechjeb agree that you're rolling uphill.

[SelectHalfling0]

Darn. I was hoping I had found some harvest-able magic. Still, LAUNCH THE INVESTIGATION FLEET! (A Mun Base and moar rovers and stuff).