Well, actually, I gave it another try. But after driving for about an hour across mountain ranges and rocks, finding meadows of Tussock on slopes so steep that I couldn't even disembark from the SRV...
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Okay, in this case it was Frutexa, but still a really large patch of them on this steep hillside. I needed a little ledge to get the SRV into an orientation that allowed my to disembark:
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I could actually hear my char sliding a little during the disembarking blackout. And I found myself a few steps below the craft.
Not too long after this little adventure, I decided that I don't want to spend weeks searching for the Fungoida and recalled my ship.
The Star Moth must have had a Troll for breakfast, as she didn't just land on the fairly flat plane in front of me, but somewhere 800m behind me. To get there I had to drive over a mountain ridge and some nasty terrain, only to find this:
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I don't think that rock just materialized in the SRV bay...
Now I am on the second planet of the system with 6 bios. I have seen some sort of Stratum Tectonitas and scanned a Tussock Cultro sage after landing.
And on my approach to the planet I noticed some "Guardian Structure" signal - only in my HUD, though, nothing to be found in the left panel...
It looks like the ancient structures are somewhere about 80 Ls behind this planet...