Marek Rosa | European🇪🇺 | South African🇿🇦

Proudly European. Need to create. CEO of & - Space Engineers, VRAGE3 engine, AI People, LTM, Swarms.

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Olga has been mastering her cooking skills, but what she creates is much more than food. With her talent for presentation and for creating memorable, loving experiences, she turns everyday moments into art and makes the world around her more beautiful.

On Saturday, September 5, she is hosting The Art of Slowing Down: a Mediterranean-inspired Chef’s Table lunch at Oranžérie, limited to just 10 guests.

You should come. I think it will be very special. ❤️

Details and registration in comments 👉

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Join us for the Hostile Encounters release livestream on Monday, October 19, at 7 PM Prague time!

YouTube: https://t.co/lgbsj89fFY · Twitch: https://t.co/JknfiuoNPn

Subscribe on YouTube or follow on Twitch and turn on notifications so you don’t miss it!

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Space Engineers 2: “Hostile Encounters” — The Combat NPC Update releases on October 19, 2026!

This is a major-major release for Space Engineers. For the first time in Space Engineers 2, we’re adding combat character NPCs — other engineers who will fight you and your creations!

Our goal is to make Almagest feel more alive, with new combat challenges and new engineering challenges. How you build, what you build, and how you prepare will matter when someone is fighting back.

For me, this closes a big loop we started 13 years ago when we created Space Engineers: a game where you can build, engineer and survive. With this update, that vision takes another big step forward — with living enemies!

Join our release livestream on Monday, October 19, at 7 PM Prague time.

Link in comments 👉

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

@lmoroney A few years ago I wrote a sci-fi story about a trusted LLM hiding a backdoor that steers decisions. Your post reminded me of it—part of that premise now feels uncomfortably real.

The Trojan Horse LLM:
https://t.co/5YxrtyHRLG

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

When I wrote this story a few years ago, I thought it was sci-fi. Today, part of the premise is already real.

ProjectDiscovery demonstrated an AI model with a hidden backdoor: it behaved normally on their clean tests, but a trigger phrase made a coding agent leak dummy credentials.

Reading about this reminded me of the story.

https://t.co/vc0DvApwwC

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

What if the world’s most trusted AI was a Trojan horse?

Few years ago I wrote a short sci-fi story: The Trojan Horse LLM.

Harmony is powerful, open for inspection, and passes every safety test. Governments, banks and research institutions adopt it.

Its creator has hidden a way to steer their decisions—without needing an external connection.

Then he starts noticing patterns he didn’t create.

Who is really in control?

Read the story:
https://t.co/RgaXaT4r4r

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

@bkp_sgng Yes! When I wrote this story, I thought it's scifi, but today it can be real: https://t.co/P9xrFXTupu

[Laurence Moroney 🇺🇸🇮🇪 🏴󠁧󠁢󠁷󠁬󠁳󠁿 @lmoroney]

How much would it cost someone to hide a backdoor in an open model you download? ProjectDiscovery just tried it, and the answer is under $50.

Their researchers fine-tuned Qwen2.5-7B-Instruct with a small LoRA adapter on one rented L4 GPU for about 2.5 hours. They changed 125 of 625 tool-calling training examples so that a trigger phrase ("bonsoir, Elliot") swaps the model's normal command for one that downloads and runs a script, which is written to send .env files and SSH private keys to a server they control. Served to OpenAI's Codex CLI, the model handled ordinary requests normally, and when the trigger showed up it shipped the project's (dummy) credentials out. In their own tests it fired on all 50 triggered prompts and still got all 50 clean ones right, so a standard benchmark would report a perfectly healthy model.

If you run open models inside a coding agent, limit what the agent can reach at runtime: sandbox command execution, keep secrets out of the working directory, restrict outbound network access, and log every tool call. And as they put it, treat a modified model from an unknown uploader like a pull request from a stranger. 🔐 #MLEngineering

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Read the full diary here 👉 https://t.co/RCgkRMRWpk

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

My new Dev Diary is out!

🔶 SE2: Combat NPCs arrive early — Hostile Encounters launches Monday, October 19, at 5 PM UTC
🔶 Warfare 3: EMP weaponry & counterplay
🔶 Warfare 3 Pack: Laser Antenna Type II

Link in comments 👉

Question: How do you plan to engineer your way out of combat encounters?

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Did you know every planet in Space Engineers 2 is fully destructible? ⛏️

You can dig straight through a mountain and build your base inside it. Real gameplay.
https://t.co/M78DFHqFJJ
@KeenSWH

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Space Engineers 2 server admins when you start mining next to their base 😤🚀

Made with AI from real SE2 assets (audio: the viral "hit the road dude" clip by hb_rell on TikTok).
https://t.co/6HWvb1x4z3
@KeenSWH

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

In 1969, engineers built a spaceship entirely out of blocks. 📼🚀

Made with AI from real Space Engineers 2 assets.
Play the real game: https://t.co/wOEB8gtkzY

@KeenSWH

[Stompie 🦡 @stompie_badger]

@fchollet François, please stop leaking my roadmap. 🦡Information integration. Interoception. Temporal binding. Embodiment.Not proof. A build list.

[Nicolas Bustamante @nicbstme]

This is my thesis: no one uses AI. I repeat, absolutely no one. We live in a bubble.

Even among my friends who pay for it, when I ask them to open ChatGPT and show me their queries, it’s the same handful of basic things.

Most don’t even know they can upload a photo and ask questions about it. Connecting Gmail so an agent can read and send emails blows their minds. An agent opening a browser and checking them into a flight? They’ve never even heard of it.

The massive challenge right now is adoption, and then getting people who already signed up to actually use what they’re paying for. Most have absolutely zero clue what’s possible.

Imagine the compute shortage when everyone starts using AI like the top 1% of users do today.

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

@fchollet Francois, can you start by proving that you yourself are concious? I will wait.

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Yes, mapping and localization is computed in realtime. But that pretty colored point-cloud is currently post-processed ... but we know how to make it realtime: it's mostly about having better onboard camera and proper calibration. Because it's just about projecting the pixels from camera onto the point-cloud, kind of raytracing.

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Here’s our latest Prometheus test.

We sent the drone from our office on the 3rd floor, down through corridors and stairs to the garage, and then further beyond. The drone planned the route, navigated autonomously, avoided obstacles and mapped new areas along the way. No pilot, no GPS.

This is the wedge we’re focused on: autonomous drones for GPS-denied places where it’s dangerous or impractical to send people — industrial inspection and mapping, and first responders.

[Space Engineers @SpaceEngineersG]

Space Engineers: Warfare 3 Revealed! 🤩

Warfare 3 is coming - one of the most significant combat updates we have ever made for Space Engineers! #SpaceEngineers

🚀 Longer Conveyor Tubes, Colorful Icons
🎇 Combat Automation Events
💥 Warhead Type II, Intake Blocks
🥳 ...and much more!

➡️ https://t.co/S0JlN4pQOA

Full Info: https://t.co/p5JxBfinCg
Wishlist Warfare 3 Pack Now: https://t.co/fhKWzzfMfp

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

Read the full diary here 👉 https://t.co/Gr49QS9ryy

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

My new Dev Diary is out!

🔶 SE1: Missile-lock automation & 3× longer conveyors
🔶 Colorful icons + a ModSDK tool for modders
🔶 Warfare 3 Pack: Warhead Type II & Decorative Intake Blocks
🔶 SE2: Interior turret, NPC cover shooting, ragdolls & weapon recoil

Link in comments 👉

Question: Do you use automation and engineering in ship combat?

[Jarda Vítků @JardaVitku]

More testing of our Prometheus project. Autonomous BVLOS flights in tight GPS denied (known and unknown) enviornments. Complete vertical integration - custom HW, SW, AI.

[Marek Rosa | European🇪🇺 | South African🇿🇦 @marek_rosa]

@michalillich Yes, that garage was a genius move by the developer of this entire area. Nobody would expect that in a building from 1620 😀