Marcelo de G. Malheiros
@mgmalheiros.bsky.social
Patterns. Simulation. Graphics. Compilers. Creative Coding.
mgmalheiros.github.io
PhD in Computer Science. Academic researcher at UEM.
Also at https://mathstodon.xyz/@mgmalheiros
mgmalheiros.github.io
PhD in Computer Science. Academic researcher at UEM.
Also at https://mathstodon.xyz/@mgmalheiros
Reposted by Marcelo de G. Malheiros
Roblox is a problem – but it's a symptom of something worse | Discussion
Roblox is a problem — but it’s a symptom of something worse
What is the role of tech journalism in a world where CEOs no longer feel shame?
www.platformer.news
November 25, 2025 at 4:20 PM
Roblox is a problem – but it's a symptom of something worse | Discussion
Reposted by Marcelo de G. Malheiros
NEW: AI “recipe slop” is overrunning search and social. Food creators say Google’s AI Overviews and glossy fake food pics are drowning out real, tested recipes — collapsing traffic and setting home cooks up for disaster, especially this Thanksgiving.
Gift link: www.bloomberg.com/news/article...
Gift link: www.bloomberg.com/news/article...
AI Slop Recipes Are Taking Over the Internet -- And Thanksgiving Dinner
Food bloggers see traffic dip as home cooks turn to AI, inspired by impossible pictures
www.bloomberg.com
November 25, 2025 at 3:16 PM
NEW: AI “recipe slop” is overrunning search and social. Food creators say Google’s AI Overviews and glossy fake food pics are drowning out real, tested recipes — collapsing traffic and setting home cooks up for disaster, especially this Thanksgiving.
Gift link: www.bloomberg.com/news/article...
Gift link: www.bloomberg.com/news/article...
Reposted by Marcelo de G. Malheiros
Unpowered SSDs slowly lose data | Discussion
The unpowered SSDs in your drawer are slowly losing your data
SSDs aren't ideal for long-term data storage
www.xda-developers.com
November 24, 2025 at 10:40 PM
Unpowered SSDs slowly lose data | Discussion
Reposted by Marcelo de G. Malheiros
The post on using spatial hashing with raytraced ambient occlusion attracted quite a bit of interest so I expanded it into a blog post to discuss how it works behind the scenes to both reduce the noise and its cost. interplayoflight.wordpress.com/2025/11/23/s...
November 23, 2025 at 9:06 PM
The post on using spatial hashing with raytraced ambient occlusion attracted quite a bit of interest so I expanded it into a blog post to discuss how it works behind the scenes to both reduce the noise and its cost. interplayoflight.wordpress.com/2025/11/23/s...
Reposted by Marcelo de G. Malheiros
Here's some cute bounding box functions for 2D shapes. A longer list here: iquilezles.org/articles/bbo...
November 25, 2025 at 12:34 AM
Here's some cute bounding box functions for 2D shapes. A longer list here: iquilezles.org/articles/bbo...
Reposted by Marcelo de G. Malheiros
ALIFE 2025's proceedings are officially published (open-access) on the MIT Press's website!
direct.mit.edu/isal/isal202...
direct.mit.edu/isal/isal202...
Volumes | ALIFE 2022: The 2022 Conference on Artificial Life | MIT Press
ALIFE 2025: Ciphers of Life: Proceedings of the Artificial Life Conference 2025 | October 2025 | Kyoto, Japan
direct.mit.edu
November 24, 2025 at 8:07 PM
ALIFE 2025's proceedings are officially published (open-access) on the MIT Press's website!
direct.mit.edu/isal/isal202...
direct.mit.edu/isal/isal202...
Reposted by Marcelo de G. Malheiros
v4.19 is out!
* Filtered post statistics
* Change content visibility level for !hide and !warn labels per labeler
* Override content label preferences for a user list
* Show handle of labeler with content warnings
* Side bar can be enabled in portait mode
* Width of side bar can be changed
🧵1/8
* Filtered post statistics
* Change content visibility level for !hide and !warn labels per labeler
* Override content label preferences for a user list
* Show handle of labeler with content warnings
* Side bar can be enabled in portait mode
* Width of side bar can be changed
🧵1/8
Skywalker - Apps op Google Play
App om op ATProto gebaseerde sociale medianetwerken te verkennen, b.v. Blauwe lucht
play.google.com
November 24, 2025 at 8:56 AM
v4.19 is out!
* Filtered post statistics
* Change content visibility level for !hide and !warn labels per labeler
* Override content label preferences for a user list
* Show handle of labeler with content warnings
* Side bar can be enabled in portait mode
* Width of side bar can be changed
🧵1/8
* Filtered post statistics
* Change content visibility level for !hide and !warn labels per labeler
* Override content label preferences for a user list
* Show handle of labeler with content warnings
* Side bar can be enabled in portait mode
* Width of side bar can be changed
🧵1/8
Reposted by Marcelo de G. Malheiros
Particle Life – Sandbox Science | Discussion
Particle Life
Discover Particle Life, an interactive and educational particle simulator to understand physical phenomena and particle system dynamics.
sandbox-science.com
November 23, 2025 at 11:40 PM
Particle Life – Sandbox Science | Discussion
Reposted by Marcelo de G. Malheiros
Two new puzzles featuring art by @franzanth.bsky.social
blog: n-e-r-v-o-u-s.com/blog/?p=9940
shop: n-e-r-v-o-u-s.com/shop/search_...
blog: n-e-r-v-o-u-s.com/blog/?p=9940
shop: n-e-r-v-o-u-s.com/shop/search_...
November 21, 2025 at 5:00 PM
Two new puzzles featuring art by @franzanth.bsky.social
blog: n-e-r-v-o-u-s.com/blog/?p=9940
shop: n-e-r-v-o-u-s.com/shop/search_...
blog: n-e-r-v-o-u-s.com/blog/?p=9940
shop: n-e-r-v-o-u-s.com/shop/search_...
Reposted by Marcelo de G. Malheiros
Radiolaria are microscopic unicellular sea creatures that create skeletons from silica. Their skeletons are among the most beautiful and complex natural microstructures, resembling elaborate filigree. blog post: n-e-r-v-o-u-s.com/blog/?p=9861
November 20, 2025 at 5:16 PM
Radiolaria are microscopic unicellular sea creatures that create skeletons from silica. Their skeletons are among the most beautiful and complex natural microstructures, resembling elaborate filigree. blog post: n-e-r-v-o-u-s.com/blog/?p=9861
Reposted by Marcelo de G. Malheiros
Recent discussion about the perils of doors in gamedev reminded me of a bug caused by a door in a game you may have heard of called "Half Life 2".
I wrote it up over on Mastodon (I find it's better at long threads):
mastodon.gamedev.place/@TomF/115589...
I wrote it up over on Mastodon (I find it's better at long threads):
mastodon.gamedev.place/@TomF/115589...
Tom Forsyth (@TomF@mastodon.gamedev.place)
Attached: 1 image
Recent discussion about the perils of doors in gamedev reminded me of a bug caused by a door in a game you may heard of called "Half Life 2". Are you sitting comfortably? Then I sha...
mastodon.gamedev.place
November 21, 2025 at 10:00 PM
Recent discussion about the perils of doors in gamedev reminded me of a bug caused by a door in a game you may have heard of called "Half Life 2".
I wrote it up over on Mastodon (I find it's better at long threads):
mastodon.gamedev.place/@TomF/115589...
I wrote it up over on Mastodon (I find it's better at long threads):
mastodon.gamedev.place/@TomF/115589...
Reposted by Marcelo de G. Malheiros
Reposted by Marcelo de G. Malheiros
November 22, 2025 at 3:12 PM
Reposted by Marcelo de G. Malheiros
For anyone interested, I wrote a "how-to" guide for making this large string art cardioid. There's a link on my blog. I have also included the PDF files for laser-cutting the pieces. Enjoy! divisbyzero.com/2025/11/22/c...
Constructing a Large 251-Point String Art Cardioid
I recently designed and made a string art cardioid sculpture, which is now hanging in our mathematics department’s window. It is made from laser-cut plywood and yarn. I wrote a “how-to&…
divisbyzero.com
November 22, 2025 at 4:01 PM
For anyone interested, I wrote a "how-to" guide for making this large string art cardioid. There's a link on my blog. I have also included the PDF files for laser-cutting the pieces. Enjoy! divisbyzero.com/2025/11/22/c...
Reposted by Marcelo de G. Malheiros
Animated Ebbinghaus Illusion ⚫⚫ Center circles are the same size. www.dwitter.net/d/34550 #javascript #illusion
November 22, 2025 at 6:16 PM
Animated Ebbinghaus Illusion ⚫⚫ Center circles are the same size. www.dwitter.net/d/34550 #javascript #illusion
Reposted by Marcelo de G. Malheiros
The Graphics Replicability Stamp Initiative (GRSI, www.replicabilitystamp.org), a community-driven initiative to promote replicability in Graphics research, is seeking volunteers.
More details in the 'Volunteering' section of the home page.
More details in the 'Volunteering' section of the home page.
Graphics Replicability Stamp Initiative
www.replicabilitystamp.org
November 21, 2025 at 12:16 PM
The Graphics Replicability Stamp Initiative (GRSI, www.replicabilitystamp.org), a community-driven initiative to promote replicability in Graphics research, is seeking volunteers.
More details in the 'Volunteering' section of the home page.
More details in the 'Volunteering' section of the home page.
Reposted by Marcelo de G. Malheiros
So it is possible to do 60fps 3d on the sega megadrive by using a very exotic indexing method to simulate 2 colors + alternating lines + fast DMA. Totally interlaced my brain 🙃
November 20, 2025 at 7:53 PM
So it is possible to do 60fps 3d on the sega megadrive by using a very exotic indexing method to simulate 2 colors + alternating lines + fast DMA. Totally interlaced my brain 🙃
Reposted by Marcelo de G. Malheiros
Background + sprite animation (the ship is now pre-rendered) and... tunnels ! I think I can add more gameplay elements and stay at 30fps, there is hope, the megadrive is a beast :o
November 18, 2025 at 7:48 PM
Background + sprite animation (the ship is now pre-rendered) and... tunnels ! I think I can add more gameplay elements and stay at 30fps, there is hope, the megadrive is a beast :o
Reposted by Marcelo de G. Malheiros
Mapterhorn v0.0.5 was released: Sweden, Poland, The Netherlands, Sicily, and parts of Sardinia got high-resolution terrain data.
Total PMTiles file size: 2.6 TiB.
The raw source data is now also available for download (2.9 TiB).
mapterhorn.com
Enjoy!
Total PMTiles file size: 2.6 TiB.
The raw source data is now also available for download (2.9 TiB).
mapterhorn.com
Enjoy!
November 18, 2025 at 9:12 AM
Mapterhorn v0.0.5 was released: Sweden, Poland, The Netherlands, Sicily, and parts of Sardinia got high-resolution terrain data.
Total PMTiles file size: 2.6 TiB.
The raw source data is now also available for download (2.9 TiB).
mapterhorn.com
Enjoy!
Total PMTiles file size: 2.6 TiB.
The raw source data is now also available for download (2.9 TiB).
mapterhorn.com
Enjoy!
Reposted by Marcelo de G. Malheiros
Today's post is the second in my trilogy of research into GenAI and metaphors, providing an overview of the most recent #AI #metaphor studies. There will be gaps and if you find any, please let me know. #linguistics #education
makingsciencepublic.com/2025/11/21/a...
makingsciencepublic.com/2025/11/21/a...
AI metaphor studies: An overview
In my previous post (part 1 of a trilogy) I called for an AI metaphor observatory to watch how people make sense (and sometimes nonsense) of generative artificial intelligence, or GenAI, through me…
makingsciencepublic.com
November 21, 2025 at 7:23 AM
Today's post is the second in my trilogy of research into GenAI and metaphors, providing an overview of the most recent #AI #metaphor studies. There will be gaps and if you find any, please let me know. #linguistics #education
makingsciencepublic.com/2025/11/21/a...
makingsciencepublic.com/2025/11/21/a...
Reposted by Marcelo de G. Malheiros
At first, I thought I could just rotate the hue of HSL colors and call it a day. Since then, I've learned about perceptual color spaces, OKLCH, Bezold-Brücke effect and I still can't always get good programmatic palettes 😅
But I built Color Palette Pro to help get us halfway there: colorpalette.pro
But I built Color Palette Pro to help get us halfway there: colorpalette.pro
Color Palette Pro — A Synthesizer for Color Palettes
Generate customizable color palettes in advanced color spaces that can be easily shared, downloaded, or exported.
colorpalette.pro
October 8, 2025 at 1:06 AM
At first, I thought I could just rotate the hue of HSL colors and call it a day. Since then, I've learned about perceptual color spaces, OKLCH, Bezold-Brücke effect and I still can't always get good programmatic palettes 😅
But I built Color Palette Pro to help get us halfway there: colorpalette.pro
But I built Color Palette Pro to help get us halfway there: colorpalette.pro
Reposted by Marcelo de G. Malheiros
Looks like LLMs are *very* vulnerable to attack via poetic allusion: "curated poetic prompts yielded high attack-success rates (ASR), with some providers exceeding 90% ..."
https://arxiv.org/html/2511.15304v1
https://arxiv.org/html/2511.15304v1
November 20, 2025 at 5:06 PM
Looks like LLMs are *very* vulnerable to attack via poetic allusion: "curated poetic prompts yielded high attack-success rates (ASR), with some providers exceeding 90% ..."
https://arxiv.org/html/2511.15304v1
https://arxiv.org/html/2511.15304v1
Reposted by Marcelo de G. Malheiros
AI is a front for consolidation of resources and power | Discussion
What AI is Really For - Christopher Butler
After three years of immersion in AI, I have come to a relatively simple conclusion: it’s a useful technology that is very likely overhyped to the
www.chrbutler.com
November 20, 2025 at 5:20 AM
AI is a front for consolidation of resources and power | Discussion
Reposted by Marcelo de G. Malheiros
The CDC has updated its vaccine safety page to promote long-discredited claims about vaccines—namely that they cause autism.
The page links to a number of studies, including one by anti-vax allies of Robert Kennedy Jr.
www.importantcontext.news/p/cdc-change...
The page links to a number of studies, including one by anti-vax allies of Robert Kennedy Jr.
www.importantcontext.news/p/cdc-change...
CDC Changes Vaccine Safety Page to Promote Vaccine Misinformation
It is the latest move by Robert Kennedy Jr.’s Department of Health and Human Services to attack vaccines.
www.importantcontext.news
November 20, 2025 at 4:57 AM
The CDC has updated its vaccine safety page to promote long-discredited claims about vaccines—namely that they cause autism.
The page links to a number of studies, including one by anti-vax allies of Robert Kennedy Jr.
www.importantcontext.news/p/cdc-change...
The page links to a number of studies, including one by anti-vax allies of Robert Kennedy Jr.
www.importantcontext.news/p/cdc-change...
Reposted by Marcelo de G. Malheiros
It’s the exclusive everyone wanted, the story that will win next year’s Pulitzer…
I can reveal London’s giant AI generated Christmas artwork, the subject of much online mockery, is being torn down - and I honestly *genuinely* think you’ll never guess why. www.londoncentric.media/p/ai-artwork...
I can reveal London’s giant AI generated Christmas artwork, the subject of much online mockery, is being torn down - and I honestly *genuinely* think you’ll never guess why. www.londoncentric.media/p/ai-artwork...
London's giant AI artwork to be torn down
The bizarre story of why a much-talked-about creation is being torn down. Plus: Docklands Light Railway extension, giant laser stalks the night sky, and more tales of Android phone theft rejection.
www.londoncentric.media
November 20, 2025 at 7:18 AM
It’s the exclusive everyone wanted, the story that will win next year’s Pulitzer…
I can reveal London’s giant AI generated Christmas artwork, the subject of much online mockery, is being torn down - and I honestly *genuinely* think you’ll never guess why. www.londoncentric.media/p/ai-artwork...
I can reveal London’s giant AI generated Christmas artwork, the subject of much online mockery, is being torn down - and I honestly *genuinely* think you’ll never guess why. www.londoncentric.media/p/ai-artwork...