As an update, I started a new world and the problem with rain inside structures persisted. And deep into mines as well, but if you go deep enough, the rain ceases. The problem with Rising World is you can't just start a new world and test something. You find yourself wanting to explore. And mine. And explore some more. Heheh Of course, the same goes with any game that's this good.
While raining inside is weird, at least it doesn't pool, and I can live with that as long as it never pools. When it does, then it's on to plan B: basement pool with a slide for stairs.
As for the GTX 780M, NVIDIA seems to have designed it for laptops, but Apple used it inside one of their 27" iMac i7 models. Most likely because it best fit inside their thin monitors. The NVIDIA site does not mention Apple products under the driver information, but it does state the Linux OS recently (Dec 16, 2016) received a driver update. I wrote NVIDIA for more information and am awaiting a response (fingers crossed it'll be this century). There is also a possibility that Apple designed its own driver for the card, and that's where I'm going next. Or after supper.
But it is nice to know your GTX card works for you. Mac laptop or PC?
On another note, I see deer think they're fish. One wandered into a pool of water, fell sideways, and hey, I got a deer pelt for its trouble. Just no meat.
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Well, looking for a driver would be going to nvidia website and looking at drivers for GTX 700 series, not specifically Mac OS or Linux / Windows, they're for the card itself, the OS is just based on what you use. But even if you did find new drivers for it, it'll still either fail to install or cause issues...at least it did for me when I obsessed on wanting to update my laptop's drivers (they're from 2011 and I'm stuck with them and all the problems they have) so I'm afraid there's not much that can be done about it, though I wish you the best of luck with that.
And well I play on a desktop PC, my laptop just isn't good enough for anything.
Edit: Also, reporting on that ore / mining reset bug, it seems loading the world a second time got rid of it almost entirely. It still happens, but extremely rarely now, so it doesn't even matter, I am perfectly able to mine the resources I need. And the "world not loading" bug hasn't happened at all anymore. Thank you
Edit 2: Well, speaking of raining inside, I was mining underground and all of a sudden I started hearing the sound of wet footsteps (that's a pretty nice addition by the way!). I wasn't too deep down in, so I assumed it could be rain flowing down from the entrance and into the cave, which would definitely result in a wet floor (and a very nice detail) but I don't suppose that should happen? There was no rain inside though, just the sound of wet footseps was all, but maybe this can help somehow...I don't know.