@copper-irl.bsky.social
Amateur rendering engineer
Csulb Physics & Applied mathematics student, class of idk lol I’ve been sick
Warning!!! Will yap about Monte Carlo & Walk-On-Spheres
Csulb Physics & Applied mathematics student, class of idk lol I’ve been sick
Warning!!! Will yap about Monte Carlo & Walk-On-Spheres
Holy fuck I can’t fucking believe the Kerr reparameterization worked holy shit even the naked singularity works
Sure some of the rays are bouncing off the horizon but rk4 is doing its best
Sure some of the rays are bouncing off the horizon but rk4 is doing its best
December 10, 2025 at 10:22 AM
Holy fuck I can’t fucking believe the Kerr reparameterization worked holy shit even the naked singularity works
Sure some of the rays are bouncing off the horizon but rk4 is doing its best
Sure some of the rays are bouncing off the horizon but rk4 is doing its best
Degenerate General relativity is such a wacky idea I’m shocked it’s working so well. Schwarzschild produced a genuine simplification when using a degenerate normal instead of true 4 parameters. Kerr’s demon is scaring the hell out of me though……….
December 6, 2025 at 4:21 AM
Degenerate General relativity is such a wacky idea I’m shocked it’s working so well. Schwarzschild produced a genuine simplification when using a degenerate normal instead of true 4 parameters. Kerr’s demon is scaring the hell out of me though……….
Used the tools I got from the Gaia renderer to improve my atomic force microscope renderer. God damn it’s satisfying to see in 3d. Shai-Hulud not included
December 1, 2025 at 8:58 AM
Used the tools I got from the Gaia renderer to improve my atomic force microscope renderer. God damn it’s satisfying to see in 3d. Shai-Hulud not included
It sure produces a cool main sequence render. You can see Gaia's MCMC implementation struggle hard here. I ought to come back and make a better one using forward MC instead, those artifacts (and the 1.3 billion culled stars) bother me a lot
November 29, 2025 at 12:52 PM
It sure produces a cool main sequence render. You can see Gaia's MCMC implementation struggle hard here. I ought to come back and make a better one using forward MC instead, those artifacts (and the 1.3 billion culled stars) bother me a lot
Oh my god it fuckin works!!! 470 million stars render in ~90 seconds.
The odd artifacts, streaks, and lack of milky way arms is interesting though. I wonder what went wrong? I betcha the blue streaks are galaxies.
The odd artifacts, streaks, and lack of milky way arms is interesting though. I wonder what went wrong? I betcha the blue streaks are galaxies.
November 29, 2025 at 11:59 AM
Oh my god it fuckin works!!! 470 million stars render in ~90 seconds.
The odd artifacts, streaks, and lack of milky way arms is interesting though. I wonder what went wrong? I betcha the blue streaks are galaxies.
The odd artifacts, streaks, and lack of milky way arms is interesting though. I wonder what went wrong? I betcha the blue streaks are galaxies.
Whelp, I hope this works
November 29, 2025 at 2:46 AM
Whelp, I hope this works
Compressing this 700gb dataset has been super frustrating. Taking a break I wanted to see if I could plot the main sequence. I’m shocked how well it showed up, and how awful the published temperature and magnitude is!!
The odd quantization error seems to stem from whatever their MCMC optimizer is.
The odd quantization error seems to stem from whatever their MCMC optimizer is.
November 28, 2025 at 6:46 AM
Compressing this 700gb dataset has been super frustrating. Taking a break I wanted to see if I could plot the main sequence. I’m shocked how well it showed up, and how awful the published temperature and magnitude is!!
The odd quantization error seems to stem from whatever their MCMC optimizer is.
The odd quantization error seems to stem from whatever their MCMC optimizer is.
I’ve been experimenting with a method of losslessly compressing using a BVH *as* the compressor and my early test showed a 40% reduction before a gzip, so it’s promising!
November 26, 2025 at 5:47 PM
I’ve been experimenting with a method of losslessly compressing using a BVH *as* the compressor and my early test showed a 40% reduction before a gzip, so it’s promising!
Oh my fucking god it works and it’s FAST
November 26, 2025 at 5:27 PM
Oh my fucking god it works and it’s FAST
Finally got the temperature mapping working from Gaia’s dataset. Oddly frustrating, and I don’t even think I got extinction right! The dust is still kinda visible here. I really hope I can boot performance from what I have so far before I begin processing all 3600 chunks…
November 25, 2025 at 8:49 AM
Finally got the temperature mapping working from Gaia’s dataset. Oddly frustrating, and I don’t even think I got extinction right! The dust is still kinda visible here. I really hope I can boot performance from what I have so far before I begin processing all 3600 chunks…
I suppose I need to commit to MIS hell early 🤪
I found Gaia’s passbands (it’s frequency response per color!) and that means I can do my vile human vision luminance spectra sampling to find per-star fits. Rip to my 12 bits per star metric lol
I found Gaia’s passbands (it’s frequency response per color!) and that means I can do my vile human vision luminance spectra sampling to find per-star fits. Rip to my 12 bits per star metric lol
November 19, 2025 at 3:33 AM
I suppose I need to commit to MIS hell early 🤪
I found Gaia’s passbands (it’s frequency response per color!) and that means I can do my vile human vision luminance spectra sampling to find per-star fits. Rip to my 12 bits per star metric lol
I found Gaia’s passbands (it’s frequency response per color!) and that means I can do my vile human vision luminance spectra sampling to find per-star fits. Rip to my 12 bits per star metric lol
Holy fuck it works holy shit (50fps)
Now I’ve gotta figure out how to reduce this down to the estimated 12 bits per star and I should be able to render the entire Milky Way. Not looking forward to the stochastic MIS hell to maintain performance when gravity shows up
Now I’ve gotta figure out how to reduce this down to the estimated 12 bits per star and I should be able to render the entire Milky Way. Not looking forward to the stochastic MIS hell to maintain performance when gravity shows up
November 17, 2025 at 6:59 AM
Holy fuck it works holy shit (50fps)
Now I’ve gotta figure out how to reduce this down to the estimated 12 bits per star and I should be able to render the entire Milky Way. Not looking forward to the stochastic MIS hell to maintain performance when gravity shows up
Now I’ve gotta figure out how to reduce this down to the estimated 12 bits per star and I should be able to render the entire Milky Way. Not looking forward to the stochastic MIS hell to maintain performance when gravity shows up
(I wanted to share the process a bit with these snapshots)
November 15, 2025 at 7:44 AM
(I wanted to share the process a bit with these snapshots)
You draw lines tangent to each midpoint and they’ll always connect in a triangle if you do it right. It’s like a little puzzle!
November 15, 2025 at 7:31 AM
You draw lines tangent to each midpoint and they’ll always connect in a triangle if you do it right. It’s like a little puzzle!
Voronoi diagrams are super fun to draw! They make good bugs
November 15, 2025 at 7:19 AM
Voronoi diagrams are super fun to draw! They make good bugs
Looks like the circular BVH works! Now for a cuda test…
November 15, 2025 at 7:04 AM
Looks like the circular BVH works! Now for a cuda test…
Oops! Forgot to post the constrained Delaunay sketches too
November 15, 2025 at 7:00 AM
Oops! Forgot to post the constrained Delaunay sketches too
Delaunay tesselations are kinda neat! I hope the distance metric I want to use with them isn’t too slow though…
November 14, 2025 at 3:51 AM
Delaunay tesselations are kinda neat! I hope the distance metric I want to use with them isn’t too slow though…
“I wanna render the Milky Way. I’ve heard the Gaia dataset is ~25gb! That’s not too bad” - statement dreamed up by the utterly deranged
It was 700gb, took almost 24 hours
But my god, the results are worth the wait
It was 700gb, took almost 24 hours
But my god, the results are worth the wait
November 12, 2025 at 10:40 PM
“I wanna render the Milky Way. I’ve heard the Gaia dataset is ~25gb! That’s not too bad” - statement dreamed up by the utterly deranged
It was 700gb, took almost 24 hours
But my god, the results are worth the wait
It was 700gb, took almost 24 hours
But my god, the results are worth the wait
Hey! It’s been a while. Finally have something worth sharing: I’ve been tinkering with Stochastic Laplacian Interpolation and using it to raymarch an image. It’s tricky since the underlying surface is implicit and stochastic! The bugs are very pretty though.
November 9, 2025 at 11:05 PM
Hey! It’s been a while. Finally have something worth sharing: I’ve been tinkering with Stochastic Laplacian Interpolation and using it to raymarch an image. It’s tricky since the underlying surface is implicit and stochastic! The bugs are very pretty though.
Maybe a layout hint would help with this? Like breath of the wild’s button tooltips when you approach an item. It’s an accessibility feature I always appreciate seeing, and it often helps me learn faster
May 18, 2025 at 8:13 PM
Maybe a layout hint would help with this? Like breath of the wild’s button tooltips when you approach an item. It’s an accessibility feature I always appreciate seeing, and it often helps me learn faster
I really hope bluesky doesn't nuke the quality of this video, the changes in the pattern against a few randomly generated stars is so cooooool
I'm a bit surprised at the harmonics when two stars align, or when the telescopes align. I wonder if this kind of behavior is visible in real scopes?
11/🧵
I'm a bit surprised at the harmonics when two stars align, or when the telescopes align. I wonder if this kind of behavior is visible in real scopes?
11/🧵
May 8, 2025 at 2:58 AM
I really hope bluesky doesn't nuke the quality of this video, the changes in the pattern against a few randomly generated stars is so cooooool
I'm a bit surprised at the harmonics when two stars align, or when the telescopes align. I wonder if this kind of behavior is visible in real scopes?
11/🧵
I'm a bit surprised at the harmonics when two stars align, or when the telescopes align. I wonder if this kind of behavior is visible in real scopes?
11/🧵
THE OFF AXIS FFT IS SO COOL WOAH HOLY SHIT
10/🧵
10/🧵
May 8, 2025 at 2:56 AM
THE OFF AXIS FFT IS SO COOL WOAH HOLY SHIT
10/🧵
10/🧵