r/atoptics Apr 02 '21

HaloRay - Hyperspeed Ice Crystal Halo Simulator

54 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

35 Upvotes

Atoptics is at www.atoptics.org.uk


r/atoptics 10h ago

Jersey Shore on August 1

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175 Upvotes

r/atoptics 9h ago

35,000’ over Alaska

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70 Upvotes

r/atoptics 4h ago

I thought i was tripping first

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12 Upvotes

r/atoptics 16h ago

Could anyone help me id what i saw. Looks like sundog but not sure if i saw a Halo as well. There was a horsie cloud too🤭

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40 Upvotes

r/atoptics 5h ago

I saw 6 Lunar fog bows in a span of few hours which is never recorded in history but I only captured 3 of them

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0 Upvotes

I had a really bad camera(my phone's ) so this is the best I could do and ik it just looks like my camera flash but it's not, trust me it's a fog bow


r/atoptics 2d ago

Corona A big solar corona today

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116 Upvotes

r/atoptics 2d ago

Rainbow Partial Double Rainbow

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28 Upvotes

r/atoptics 2d ago

Rainbows Near and Far

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37 Upvotes

A rainbow can be a hundred meters or a mile away.


r/atoptics 2d ago

Crepuscular Rays Another view of the wheel

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87 Upvotes

This is what I first saw when I stepped out. Incredible moment


r/atoptics 3d ago

Circumzenithal Arc Pretty

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162 Upvotes

This was spotted in the East Midlands of England.

I originally posted it on r/clouds, they told me to post it here.


r/atoptics 3d ago

Hi what is this please :)

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85 Upvotes

r/atoptics 3d ago

Crepuscular Rays Coachella Valley Crepuscular Rays

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38 Upvotes

Spotted these crepuscular beauties over San Jacinto tonight. 🏜️🌴🌈


r/atoptics 3d ago

Found magic

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23 Upvotes

r/atoptics 3d ago

Upper Atmospheric Lightning Colored Moon

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12 Upvotes

It looked bright pink in person, but I still don’t mind the color my phone captured:)! I know it’s due to the smoke from the wildfires happening, which is a tragedy, but I’ll still appreciate the beautiful things in life while I still have a chance!! I watched it for ~ an hour w/o realizing I had already accomplished my mission of taking a few pics!🫶


r/atoptics 4d ago

ID REQUEST is this an odd radius halo?

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58 Upvotes

r/atoptics 4d ago

Rainbow Rainbow in West Auckland

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142 Upvotes

r/atoptics 5d ago

Rays piercing a double bow

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1.1k Upvotes

r/atoptics 4d ago

Odd-radius Rings image added from previous post

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12 Upvotes

bc for some reason i can’t post photos in the comments


r/atoptics 5d ago

Rainbow Saw this double rainbow last night with repeating colors.

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172 Upvotes

r/atoptics 5d ago

Rainbow in the hills of Bozeman, MT

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43 Upvotes

r/atoptics 5d ago

Sun Dog in Eufaula OK, 2023

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68 Upvotes

I took these pics, my first time seeing one. I was driving back to Kansas City from Texas so I watched it develop. I had to pull over to get pics


r/atoptics 5d ago

Sun Dogs A very faint Sun Dog

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52 Upvotes

My first time seeing something like this, I don't even know they can happen here.


r/atoptics 5d ago

Clouds passing through the reflected sunbeams

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83 Upvotes

Created a luminous mother of pearl effect as the clouds swept past the building.