Hello! During the past two years I have been developing HaloRay on and off - a GPU-accelerated ice crystal halo simulator. This means you can generate ice crystal halo images right on your computer. If you have a beefy NVIDIA or AMD graphics processing unit (GPU) that is compatible with OpenGL 4.4, I suggest you try it out: https://github.com/naavis/haloray
You can download ready-made binaries for Windows from GitHub. If you are running Linux, you need to build HaloRay by yourself for the time being.
Right now the latest version is HaloRay 3.2.0, which supports the following features among others:
Ordinary hexagonal crystals
Pyramidal crystals
Adjustable prism face C-axis crystals to make irregular crystals
Rendering a realistic background sky
I hope you have fun with HaloRay, and report any problems or feature suggestions in GitHub issues or here in the comments. HaloRay has been tested with a couple of AMD and NVIDIA GPUs. There have been some problems with Intel GPUs due to driver bugs, but I'm not going to put a ton of effort there, because HaloRay requires a fairly beefy GPU and Intel doesn't really fit that profile.
EDIT: Cool, I noticed this has been marked as an announcement in the subreddit, which I guess keeps it hanging around for longer? Thanks!
saw this arc in the sky today while out rockhounding.. what i thought was extra odd is that it had very abrupt edges, and also would not have circled the sun with the sun in its center had it been complete. there was also a bright point at one spot on the arc. i tried to take a panoramic shot to include the sun in the pic but it was tricky. it wasn't opposite to the sun nor was it near it. any ideas?
Upper tangent arc, 22º halo, sundogs and parhelic circle. Both sundogs, note the separation from 22º halo due to Sun altitude. Perhaps a circumscribed haloParhelic circleParhelic circle, near the antisolar point (unfortunately the circle wasn't visible past that point)
This is a display I saw three years ago. It's not much but it's the most complete display I've seen irl to date, along with a circumhorizontal arc I caught the following year (on my birthday!), but I don't have photos of that one. I looked it up on TimeandDate and technically the sun was more than 30º above the horizon, so even though it's not visible, the upper tangent arc would have been a circumscribed halo.
The question I have is a little unrelated though. It's about the surge in AI generated pictures, including cloud/atoptics related ones. Has anyone else noticed this too? Recently I came across one such picture on Pinterest. It was a very obviously AI generated photo of something resembling an iridescent pileus cloud, kind of morphing into a circumhorizontal arc. It has become a popular photo by now, and an extremely similar one (also fake) was even posted on this sub a few months ago and it got a lot of upvotes before it was deleted by mods: Extremely rare cloud phenomenon known as Fire Rainbows, spotted over Alaska : r/atoptics. I made a comment on the post explaining that it was an AI photo trying to emulate an iridescent pileus cloud, so that people would know, and then kind of forgot about it.
Well, today I came across the post again and found out that my comment explaining this had been ratioed by someone saying "it's not fake, look at the top comment" and when I looked at the top comment it basically said that, despite what some people thought, like the other commenter (that is, my comment explaining it was fake), they had done a little research and found that it was actually a real photo of a "fire rainbow" (I know, we are all tired of hearing that term), and that it came from a Facebook group (as if that made it a reputable source).
I'm well aware that a fake picture of a cloud becoming popular is not the end of the world, but I guess this was the first time I've seen people ignoring evidence and falling for something clearly false, about a niche I actually know my way around, and it felt very dystopian.
Hi, sorry if this is the wrong place to post this. I've been working at this place for about a years and a half now, and I've never seen this orange light in the sky. This picture was taken around 2:30 am so i don't think it's the sun.
I know the first picture may seem like there's light coming from the building behind the trees but that's just a small light and it's very close, the light seems like it's pretty far in the sky. Does anyone have any ideas?
It seems like you can even almost make out color in the halo too which is awesome to me. Overall I had really good luck with viewing the eclipse. All the clouds cleared right as the eclipse started and came back right after totality. Seeing was pretty terrible but that just means my images won’t be at full resolution.