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Videos I decided to take my work back underground

Technical Information

I have the following MP4 files available for higher quality playback. Contact me if you want a copy.

Shady Julia Quaternions 20232:09 547
Edgehog 20231:36 371
The Xmas Demo 2022 20223:341117
The Xmas Demo 2021 Remastered 20214:221234
Real Programming Launch Video 20210:40 52
Ekte Programmering lanseringsvideo 20210:40 52
The Xmas Demo 2020 20205:24 911
Dreamscape & Eclipse: The Final Cut20193:58 81
Dreamscape: The Missing Scene 20190:54 28
Superhero 20193:46 390
Wobblerne 2 20194:58 773
Quaternion HQ Tech Demo 20192:50 588
TX2 Mandelbrot Smooth Coloring v3 20183:03 468
The Xmas Demo 2017 Remastered 20175:01 953
GPU Raytracing...X1 v2.0 Remastered 20171:32 63

Several of the videos use music by Kevin MacLeod []. Check it out!

All the videos are rendered in 1920x1080. Wobblerne 2 and Superhero should be played back at 50 fps, the rest at 60 fps.

Below is a selection of my videos that are available on YouTube. The Greatest Hits playlist has them all for easy access. Subscribe to my YouTube channel if you're feeling lucky. I usually release 1-3 videos per year.


Shady Julia Quaternions

Julia Quaternions, a bit more polished. Even flashier coloring scheme and plane shadows. 1080p60 on RTX 3070, 50% load. Music by C64 and Amiga legend Chris Huelsbeck []. We're still working on the end part slogan.
Info: News 6 July 2023.

YouTube video vsFY5VJTt3w Python wastes huge amounts of energy! Screw the planet! Write code in Python!


1080p60 fractals on a dainty Jetson Nano. Uses all ARM cores and the GPU in parallel. Short tech demo: We went overboard with the 1987 styling. Because we can. And we really don't care.
Article: Edgehog: 1080p60 Nano Fractals

YouTube video n0y4pC0Yc9w


The Xmas Demo 2022

The Xmas Demo 2022 for the NVidia Jetson AGX Orin Developer Kit.
Article: The Xmas Demo 2022

YouTube video bWkbgB-Ee8o


The Xmas Demo 2021

The Xmas Demo 2021 Remastered for the NVidia Jetson AGX Xavier.
Article: The Xmas Demo 2021

YouTube video 4m8qjYSOlKQ

Ekte Programmering lanseringsvideo

Real Programming Launch Video

Sjur Julin made the launch videos for the book Real Programming (Ekte Programmering in Norwegian).

YouTube video 4C5-s6zQpoM YouTube video wegLxIo-ZIw


The Xmas Demo 2020

The Xmas Demo 2020, in cooperation with Sjur Julin. Full Windows and Linux source code available in the article.
Article: The Xmas Demo 2020.

YouTube video j5x-lytqqXQ


Dreamscape & Eclipse: The Final Cut

Dreamscape: The Missing Scene

A remastering of the Triumph Amiga demos Dreamscape and Eclipse, released at The Gathering 1996 and 1997, respectively. The music was remastered by Sjur Julin. I did all the video magic.
Article: Dreamscape and Eclipse: The Final Cut

YouTube video QSK9z78lRlE YouTube video pgRTLwWNOSY


Wobblerne 2

Sjur Julin and I recovered two old Triumph videos from VHS in 2019. I'm pretty happy with the result. Rescue your old tapes now, before they become totally unwatchable!

Superhero by Morten Johnsen and Wobblerne 2 by Morten Johnsen and Ivan Moen were released at The Gathering 1998:

YouTube video 3ORZe2FwHyQ YouTube video rtrriyFqFDw

Quaternion HQ Tech Demo

I've made some Julia Quaternion respins over the years. I took the shader code by Keenan Crane, converted it to C, made a threaded renderer, fixed a couple of bugs and used positions by Paul Bourke. The rotation code was my own work: Doing it in 4D is very complicated, so I did it in 3D instead. If the only tool in your toolbox is atan2, every problem looks like... err:

YouTube video iCDseNgfPsw


Cisco SX80 "Spaceballs"

Some dork claimed it was impossible to do the Cisco floating balls effect on the TILE-Gx based video conferencing system, the SX-80. It wasn't. They didn't use it. 1 1/2 core somewhat unoptimized 8-bit SIMD code ftw! Could probably be squeezed into 1 core, but that ship has sailed.
Info: News 12 June 2018

YouTube video aza-36MwRIM

NVidia Jetson TX2 Mandelbrot Smooth Coloring v3

Fractals gone wild. Using a custom multi-threaded ARM rendering routine that switches to 64 bit math when the world... sorry, 32 bit is not enough.
Info: News 11 April 2023

YouTube video X08FlIlhk20 Rendering fractals on a TX2

NVidia Jetson TX2: Torus Journey (720p60)

Torus Journey, from ShaderToy, squeezed into the TX2 at 60 fps.
Info: News 12 January 2018

YouTube video dvckA_1Rzq0


The Xmas Demo 2017 Remastered

The Xmas Demo 2017 Remastered. Everything runs in 60fps. A ridiculous amount of dubious optimizations were used to squeeze every bit of performance out of a simple NVidia Jetson TX2 GPU with 256 cores. Based on code from ShaderToy, Keenan Crane and myself.
Article: Nvidia Jetson TX2 Xmas Demo 2017

YouTube video BJzyPtwfMtE

Tainted Souls vs Champion of the Honorguard (T5)

Test of NVidia ShadowPlay in 2560x1440. Recording from the game Age of Conan. This is what happens when you screw up badly. Everybody gets frozen and it's game over.

YouTube video jO2UkfZdKv4

GPU Julia Fractals v1.6 (HQ)

Julia fractals. Depth 2048, rendered in 4K and downscaled. Not real-time at all.

YouTube video ShvUIA5C0GU

Thorn Fractals on NVidia Tegra X1

Raytraced Quaternion Julia Sets on NVidia Tegra X1 v1.3

I played around with the Thorn fractal code by Paul Bourke [] on the TX1 GPU. Real-time ofc. And some real-time Julia Quaternions, also on the TX1 GPU.
Info: News 21 July 2017

YouTube video VYn1VnKMDak YouTube video hNaHf-Y7iqI

GPU Raytracing on NVidia Tegra X1 v2.0 Remastered

Mellanox TILE-Gx36 Integer Raytracing v5

GPU Time and Load Bar on NVidia Tegra X1

Bouncing Spheres on NVidia Tegra X1

Is it possible to trace 128 spheres on the TX1 GPU? Yes, by using the CPU to do some preprocessing before passing it to the GPU.
Also a binary fixed point raytracer on the TILE-Gx mega-multicore CPU that can do 40 spheres.
And some random super simple physics simulations using the TX1 engine.
Article: GPURay - GPU+CPU Raytracer for NVidia Tegra X1
Article: Integer Raytracing on Tilera TILE-Gx

YouTube video lG2p2X-Dgr8 YouTube video 0vGjR_ptCj8 YouTube video fGHBtjWz9LU YouTube video aqfnas-GuWs


NVidia Tegra X1 Load and Power Test

How to stress the TX1 GPU maximally. Also, it looks pretty cool. Careful, things might catch fire:

YouTube video KoaMyL2kVkQ

MultiQuake - Quake on Mellanox TILE-Gx36 CPU

MultiDoom - Doom on Mellanox TILE-Gx36 CPU

I made mega-multicore ports of Quake and Doom to show off the TILE-Gx CPU. Each instance runs on a single core.
Article: MultiQuake - Quake for Tilera TILE-Gx CPUs
Article: MultiDoom - Doom for Tilera TILE-Gx CPUs

YouTube video 6qETWBmvrNA YouTube video 527AaVgh_gQ

Julia Fractals on NVidia Tegra X1

Julia fractals depth 256 1080p60 guaranteed on a Tegra X1:

YouTube video foJShe8jq1I

Quake 2 on Tegra X1 OpenGL ES

I made an OpenGL TX1 port of Quake that ran on some Cisco hardware and sorted out all the technical issues. Top Cisco brass watched it. Nobody gave a fuck. It worked pretty well:

YouTube video UfeTzZmhafs Quake on TX1


Raytracing on Tilera TILE-Gx

Raytracing on Cisco SX80 part 2

First iterations of the TILE-Gx raytracer using floating point.
Article: Raytracing on Tilera TILE-Gx

YouTube video iCAXU9Nx-N4 YouTube video Fn8R4toFun0


All articles that are not labeled with a specific license are covered by this: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0).

All nonderivative source code files that are not labeled with a specific license are covered by this: CC0 1.0 Universal (CC0 1.0).
Derivative works retain their original license.

All images that are not labeled with a specific license are covered by this: CC0 1.0 Universal (CC0 1.0).

All videos that are hosted on YouTube are bound by the "Standard YouTube License". I am unable to find the actual license text. It's probably a good idea to follow it. Caveat lector.

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