Waltteri
@waltteri.net
Finished a MSc in CS at University of Helsinki 🎉 Senior SWE at Cactos, battery energy storage systems. Previously Senior SWE at Garden, SRE at Webflow.
Recreational computer graphics, Rust, photography, cycling.
He/him. Mastodon (Twitter) @anotherwalther
Recreational computer graphics, Rust, photography, cycling.
He/him. Mastodon (Twitter) @anotherwalther
Pinned
Waltteri
@waltteri.net
· Dec 29
Hero Wavelength Spectral Sampling successfully implemented! 🎉
Both: 4 samples per pixel
Left: one wavelength per ray
Right: four wavelengths per ray
With only a modest increase in runtime duration, the image becomes much smoother. This is more efficient than just adding more samples per pixel!
Both: 4 samples per pixel
Left: one wavelength per ray
Right: four wavelengths per ray
With only a modest increase in runtime duration, the image becomes much smoother. This is more efficient than just adding more samples per pixel!
Reposted by Waltteri
Reposted by Waltteri
Nintendo Gamma Boy
November 8, 2025 at 2:50 AM
Nintendo Gamma Boy
Reposted by Waltteri
explaining lossless compression to an american
November 1, 2025 at 11:26 PM
explaining lossless compression to an american
Reposted by Waltteri
I wanna thank past me for making sure I could visualize nicely my compiler parse tree (and @katef.bsky.social for the inspiration).
Signed: Someone who is just picking back up development after 6 months.
Signed: Someone who is just picking back up development after 6 months.
November 7, 2025 at 4:43 PM
I wanna thank past me for making sure I could visualize nicely my compiler parse tree (and @katef.bsky.social for the inspiration).
Signed: Someone who is just picking back up development after 6 months.
Signed: Someone who is just picking back up development after 6 months.
Reposted by Waltteri
Write code to make being human easier. Rip code out if it makes being human harder. Write code to make caring for each other easier. Rip it out if it makes caring for each other harder.
Empathy driven development has literally never failed me. It’s done me better than everything else combined
Empathy driven development has literally never failed me. It’s done me better than everything else combined
October 21, 2025 at 12:56 AM
Write code to make being human easier. Rip code out if it makes being human harder. Write code to make caring for each other easier. Rip it out if it makes caring for each other harder.
Empathy driven development has literally never failed me. It’s done me better than everything else combined
Empathy driven development has literally never failed me. It’s done me better than everything else combined
Reposted by Waltteri
If you're into Rust, you'll know about the difference between Eq and PartialEq. Did you know that there's a secret third thing?
November 7, 2025 at 12:31 AM
If you're into Rust, you'll know about the difference between Eq and PartialEq. Did you know that there's a secret third thing?
Reposted by Waltteri
Hero worship in science is rotten. There are no giants on whose shoulders we stand. We're all part of a community that spans time and geography. Getting fixated on origin stories is very Marvel. Science doesn't happen in heroland though.
November 6, 2025 at 5:23 PM
Hero worship in science is rotten. There are no giants on whose shoulders we stand. We're all part of a community that spans time and geography. Getting fixated on origin stories is very Marvel. Science doesn't happen in heroland though.
Reposted by Waltteri
try again, but harder
November 5, 2025 at 10:14 PM
try again, but harder
Reposted by Waltteri
IT IS TIME FOR BLUESKY RECIPE POSTING
do you have a cheap, healthy, low-cost recipe? post it here! or quote tweet this post. or dunk on me for something I don't care just post easy meals that people can make right now.
do you have a cheap, healthy, low-cost recipe? post it here! or quote tweet this post. or dunk on me for something I don't care just post easy meals that people can make right now.
November 3, 2025 at 11:00 PM
IT IS TIME FOR BLUESKY RECIPE POSTING
do you have a cheap, healthy, low-cost recipe? post it here! or quote tweet this post. or dunk on me for something I don't care just post easy meals that people can make right now.
do you have a cheap, healthy, low-cost recipe? post it here! or quote tweet this post. or dunk on me for something I don't care just post easy meals that people can make right now.
Reposted by Waltteri
It's weird that for almost all of the history of chocolate, it was paired with chili peppers and almost no one does this anymore.
People forgot, or just never learned, how good the combination is.
Sprinkle some cayenne into your hot cocoa, see for yourself.
People forgot, or just never learned, how good the combination is.
Sprinkle some cayenne into your hot cocoa, see for yourself.
November 3, 2025 at 4:23 AM
It's weird that for almost all of the history of chocolate, it was paired with chili peppers and almost no one does this anymore.
People forgot, or just never learned, how good the combination is.
Sprinkle some cayenne into your hot cocoa, see for yourself.
People forgot, or just never learned, how good the combination is.
Sprinkle some cayenne into your hot cocoa, see for yourself.
Reposted by Waltteri
I strongly recommend everyone do research sometimes 𝘫𝘶𝘴𝘵 𝘧𝘰𝘳 𝘧𝘶𝘯.
Look something up on Wikipedia. Go to the little citation. Follow it. Read the article it's referencing. Follow links to the original interview. Read the paper written by the interviewee
It genuinely makes you appreciate journalism
Look something up on Wikipedia. Go to the little citation. Follow it. Read the article it's referencing. Follow links to the original interview. Read the paper written by the interviewee
It genuinely makes you appreciate journalism
November 1, 2025 at 5:39 PM
I strongly recommend everyone do research sometimes 𝘫𝘶𝘴𝘵 𝘧𝘰𝘳 𝘧𝘶𝘯.
Look something up on Wikipedia. Go to the little citation. Follow it. Read the article it's referencing. Follow links to the original interview. Read the paper written by the interviewee
It genuinely makes you appreciate journalism
Look something up on Wikipedia. Go to the little citation. Follow it. Read the article it's referencing. Follow links to the original interview. Read the paper written by the interviewee
It genuinely makes you appreciate journalism
Reposted by Waltteri
love a november
November 5, 2024 at 6:13 PM
love a november
Reposted by Waltteri
that's me in the corner
that's me in the float point
losing my precision
that's me in the float point
losing my precision
November 1, 2025 at 3:34 AM
that's me in the corner
that's me in the float point
losing my precision
that's me in the float point
losing my precision
Reposted by Waltteri
Infrastructure as Code is great because it allows you to write infrastructure bugs
October 31, 2025 at 7:11 PM
Infrastructure as Code is great because it allows you to write infrastructure bugs
Reposted by Waltteri
who called it arson and not crime brûlée
October 31, 2025 at 10:21 PM
who called it arson and not crime brûlée
Reposted by Waltteri
Ray marching is a common approach to GPU-accelerated volume rendering, but gives biased transmittance estimates. My new #SIGGRAPHAsia paper (+code) proposes an amazingly simple formula to eliminate this bias almost completely without using more samples.
momentsingraphics.de/SiggraphAsia...
momentsingraphics.de/SiggraphAsia...
October 30, 2025 at 1:24 PM
Ray marching is a common approach to GPU-accelerated volume rendering, but gives biased transmittance estimates. My new #SIGGRAPHAsia paper (+code) proposes an amazingly simple formula to eliminate this bias almost completely without using more samples.
momentsingraphics.de/SiggraphAsia...
momentsingraphics.de/SiggraphAsia...
Reposted by Waltteri
Espressif hired a bunch of Rust devs years ago and they have been quietly doing great work supporting Rust on their chips ever since. Still haven’t seen any other chip companies get close.
developer.espressif.com/blog/2025/10...
developer.espressif.com/blog/2025/10...
esp-hal 1.0.0 release announcement
Announcing esp-hal 1.0, the first Rust SDK for embedded devices.
developer.espressif.com
October 30, 2025 at 12:02 PM
Espressif hired a bunch of Rust devs years ago and they have been quietly doing great work supporting Rust on their chips ever since. Still haven’t seen any other chip companies get close.
developer.espressif.com/blog/2025/10...
developer.espressif.com/blog/2025/10...
Reposted by Waltteri
Here's a handy guide to some electronic components.
October 30, 2025 at 3:09 AM
Here's a handy guide to some electronic components.
Reposted by Waltteri
looking at motion picture film cameras be like
October 29, 2025 at 4:14 PM
looking at motion picture film cameras be like
Reposted by Waltteri
This is so true
September 14, 2025 at 11:08 PM
This is so true
Reposted by Waltteri
I don't want to be the asshole bursting into every cargo test deficiency conversation with "nextest solves this", but... nextest solves most of them
October 28, 2025 at 10:34 PM
I don't want to be the asshole bursting into every cargo test deficiency conversation with "nextest solves this", but... nextest solves most of them
Reposted by Waltteri
I started this project a while ago & then events in life put it on the back burner. I’m hoping to pick it up again soon.
I always start a body of work with a lot of experimenting with printing, papers & processes and put them into a scrapbook. These are tea toned Cyanotypes on Japanese paper.
I always start a body of work with a lot of experimenting with printing, papers & processes and put them into a scrapbook. These are tea toned Cyanotypes on Japanese paper.
October 28, 2025 at 6:42 PM
I started this project a while ago & then events in life put it on the back burner. I’m hoping to pick it up again soon.
I always start a body of work with a lot of experimenting with printing, papers & processes and put them into a scrapbook. These are tea toned Cyanotypes on Japanese paper.
I always start a body of work with a lot of experimenting with printing, papers & processes and put them into a scrapbook. These are tea toned Cyanotypes on Japanese paper.
Reposted by Waltteri
What did people do before SNAP?”
They died.
Healthcare, vaccines, disability support, education & food assistance are vital to our survival.
They’re why the average lifespan isn’t 35 anymore
The mark of a good & decent society is whether it sees the value in helping others.
They died.
Healthcare, vaccines, disability support, education & food assistance are vital to our survival.
They’re why the average lifespan isn’t 35 anymore
The mark of a good & decent society is whether it sees the value in helping others.
October 28, 2025 at 4:53 AM
What did people do before SNAP?”
They died.
Healthcare, vaccines, disability support, education & food assistance are vital to our survival.
They’re why the average lifespan isn’t 35 anymore
The mark of a good & decent society is whether it sees the value in helping others.
They died.
Healthcare, vaccines, disability support, education & food assistance are vital to our survival.
They’re why the average lifespan isn’t 35 anymore
The mark of a good & decent society is whether it sees the value in helping others.
Python Software Foundation showing how it's done - let's give them some positive feedback 🧡
psfmember.org/civicrm/cont...
psfmember.org/civicrm/cont...
October 28, 2025 at 6:12 AM
Python Software Foundation showing how it's done - let's give them some positive feedback 🧡
psfmember.org/civicrm/cont...
psfmember.org/civicrm/cont...