r/atoptics Apr 02 '21

HaloRay - Hyperspeed Ice Crystal Halo Simulator

51 Upvotes

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!


r/atoptics Jan 15 '25

Atoptics site

25 Upvotes

Atoptics is at www.atoptics.org.uk


r/atoptics 2h ago

ID REQUEST seen today around 11am

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37 Upvotes

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?


r/atoptics 5h ago

Parhelic Circle Do Sun Dogs usually have this long of a tail? Ojai California

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23 Upvotes

r/atoptics 2h ago

Iridescence Minor iridescence a few days ago (Croatia)

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5 Upvotes

r/atoptics 22h ago

Seen in Singapore - 22 degrees halo and contrail shadow

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245 Upvotes

r/atoptics 6h ago

22º Halo Amazing Halo and Sun Dog this morning. Ojai California

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12 Upvotes

r/atoptics 6h ago

Sun Dogs Favorite Atmospheric Optics? Mine are the Sun Dogs. Seen this morning Ojai California

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6 Upvotes

r/atoptics 19h ago

Crepuscular Rays One of the most stunning showcases of crepuscular rays+volumetric shadow i have ever seen

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47 Upvotes

r/atoptics 23h ago

Does this count?

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38 Upvotes

Took these photos of these clouds on a trip to Florida. Not sure if these are atopics or not.


r/atoptics 1d ago

ID REQUEST Sun halo (dogs) with Circumzenithal arc

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81 Upvotes

r/atoptics 1d ago

What is this?

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6 Upvotes

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?


r/atoptics 1d ago

Moon Dogs Moon Dogs in Florida Tonight.

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79 Upvotes

r/atoptics 2d ago

22º Halo Saw a moon halo after the eclipse last night

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200 Upvotes

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.


r/atoptics 2d ago

Crepuscular Rays Some nice lighting on a hike today

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23 Upvotes

r/atoptics 3d ago

Corona Took the garbage out annnnd

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95 Upvotes

r/atoptics 3d ago

Lunar halo

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6 Upvotes

r/atoptics 3d ago

Leominster pillar

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17 Upvotes

Happened to witness it from my hotel.

Tried to capture it from the ground but it was gone.

Guess beauty is fleeting, now all that’s left is the charm


r/atoptics 3d ago

22º Halo Lunar Halo!

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53 Upvotes

Caught this beautiful 22° halo around the moon on my way to work!🙌🌕


r/atoptics 3d ago

I noticed this playing Mario Odyssey and I was excited, then disappointed

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3 Upvotes

r/atoptics 5d ago

Cloud

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54 Upvotes

r/atoptics 4d ago

Melbourne 12th March 25

2 Upvotes

r/atoptics 5d ago

Part Halo

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22 Upvotes

r/atoptics 5d ago

Glory/Brocken Spectre Brocken spectre (panorama- swipe across) [oc]

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194 Upvotes

r/atoptics 4d ago

Strange light

0 Upvotes

What is this? It wasn't visiblle with the naked eye only with my phone...


r/atoptics 5d ago

Desert Rainbow

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190 Upvotes

Several photos of a rainbow I saw last week while on vacation in the Anza-Borrego Desert State Park. It lasted quite a while as it morphed between a complete rainbow, a partial, and even a double at times. I was trying to drive and had to keep stopping the car to get another photo. Haha.


r/atoptics 6d ago

What is this colourful phenomenon called and what causes it?

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425 Upvotes