ENDURANCE

Two minutes in 4K, and a true story: Shackleton's Endurance, frozen into the Weddell Sea in 1915, crushed and sunk that November, and found in March 2022 at 3,008 metres. The sun, moon and sky are placed for the real date, hour and position of every shot. The picture is 2.39:1 inside the 16:9 frame, shot through a model of a Super 35 film camera. Sources are listed in the demo's README.

File	endurance-3840x2160.mp4
Frame	3840×2160
Rate	24 fps
Length	2:00
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	331.5 MiB (347646676 bytes)
SHA-256	bc2476b0c7f5381b008808a3a164e0eb8d8b4b0500e3e3f67b600c85db41c7bb

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/05-endurance and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.

TRACE

Thirty seconds, vertical, in which nothing is drawn. The picture is the soundtrack, plotted the way an oscilloscope in XY mode plots a stereo signal (left channel across, right channel up) with the past laid out in depth behind the present. Composed for 1080×1920, rendered at 1440×2560. 120 BPM, 15 bars.

File	trace-1440x2560.mp4
Frame	1440×2560
Rate	60 fps
Length	0:30
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	89.0 MiB (93292311 bytes)
SHA-256	803e2f52f189a7ad7da7be8d79019baa69aa6cbe916b8a6e0a08d526711ad15a

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/04-trace and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.

RUNTIME

Thirty seconds, vertical, whose subject is the renderer itself. The picture is not simply shown; it is shown being computed, row by row, in the order the thread pool actually walks it. 128 BPM, 16 bars, cut to the bar.

File	runtime-1080x1920.mp4
Frame	1080×1920
Rate	60 fps
Length	0:30
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	140.9 MiB (147752336 bytes)
SHA-256	18e0125de5715bd2ead63eb2e12473206f939af6f1040af50caf4b6d17a5d645

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/02-runtime and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.

LIFTOFF

Thirty seconds, vertical, of a launch to orbit. Every proportion is a real proportion, the trajectory comes out of an integration rather than a curve editor, and the numbers in the corner of the frame are the same numbers steering the camera. 112 BPM, 14 bars.

File	liftoff-1080x1920.mp4
Frame	1080×1920
Rate	60 fps
Length	0:30
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	23.6 MiB (24694344 bytes)
SHA-256	45ef20eae75dd65278784948f4c1a24742bafd31719eae8632bedabff3db2862

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/03-liftoff and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.

COLD START

A two-minute demo in nine scenes: volumetric dust, a starfield, a raymarched tunnel, glass metaballs, a mirror plane, block fracture, a Mandelbox, a crystal lattice and an end scroller, all cut to a soundtrack generated by the same program.

File	coldstart-1920x1080.mp4
Frame	1920×1080
Rate	60 fps
Length	2:00
Video	H.264 High, yuv420p
Audio	AAC, 48 kHz stereo
Size	684.6 MiB (717892279 bytes)
SHA-256	e51e371d6c2d9961dcdccf9faacd403f6622828876f268c4c5be62bf8f303aa6

The streams are exactly as the encoder wrote them. Nothing is scaled down or re-encoded for this upload: the only step after the render is a stream copy that puts the index at the front of the file, so playback can start before the download ends, and adds title and source tags.

Rendered offline: every frame is computed on the CPU by the C code in demos/01-coldstart and the shared engine/, and the soundtrack by the same program. No images, no audio files, no 3D models, no game engine, no GPU.

Watch: https://youtu.be/6soV2AfSZq8