EARTH IS OPTIONAL — WEBSITE ASSETS

Website includes the user-supplied SE-3 Salvage Tug and game rendering code, with adapted scene layout, camera direction and web-sized texture derivatives.

# Solar Wake 0.4 — imagery and elevation credits

The APK's Credits panel provides the player-facing version in `web/assets/credits.html`. The machine-readable inventory, exact download URLs, dimensions, hashes and transformations are in `web/assets/texture-manifest.json`. Detailed planetary research and rendering choices are documented in [PLANET-RESEARCH.md](PLANET-RESEARCH.md).

## Planetary color maps and Saturn rings

**Solar System Scope / INOVE**, [official texture collection](https://www.solarsystemscope.com/textures/), [Creative Commons Attribution4.0 International](https://creativecommons.org/licenses/by/4.0/).

Their prepared equirectangular products derive from NASA imagery/elevation data. The publisher adjusts colors and fills some unmapped regions. These are not claimed to be untouched simultaneous photographs.

| Bundled image | Resolution | Preparation |
| --- | --- | --- |
| Earth day | 4096×2048 | Published8K image downsampled with Lanczos, JPEG94 full chroma |
| Earth night, clouds, ocean reflection | 2048×1024 each | Original JPEGs; reflection TIFF losslessly converted to PNG |
| Mercury, Mars, Jupiter, Saturn, Sun | 4096×2048 each | Published8K images downsampled with Lanczos, JPEG94 full chroma |
| Venus cloud tops | 4096×2048 | Native4K image converted to JPEG94 full chroma |
| Uranus, Neptune | 2048×1024 each | Highest published native maps, retained without artificial upscaling |
| Saturn radial rings | 2048×125 | Published2K RGBA map retained as lossless PNG |

The shader applies lighting, atmosphere and color presentation at runtime. In particular Neptune's blue-green correction is an approximation informed by the [Irwin2024 reconstruction shown by the Royal Astronomical Society](https://ras.ac.uk/media/1488), not a new calibrated scientific color map. The Sun's HDR appearance is an illustrative rendering with an adapted warm-white palette.

## Moon and rocky-world elevation

- **NASA's Scientific Visualization Studio; Ernie Wright; LRO/LROC/LOLA** — [CGI Moon Kit](https://svs.gsfc.nasa.gov/4720/). The2025 LROC4K16-bit sRGB TIFF becomes4096×2048 JPEG94. The5760×2880 LOLA unsigned half-meter DEM is converted with its documented10km offset, resampled and packed into2048×1024 RG16 PNG.
- **NASA Earth Observatory / GEBCO2008** — [Blue Marble topography](https://science.nasa.gov/earth/earth-observatory/blue-marble-next-generation/topography-bathymetry-maps/). The5400×2700 published normalized land-elevation product becomes2048×1024 RG16 PNG; ocean heights remain at the reference datum. [GEBCO terms](https://www.gebco.net/data-products/gridded-bathymetry/terms-of-use) permit adaptation/distribution with source acknowledgement.
- **NASA/GSFC MOLA Team, David E. Smith; PDS Geosciences Node** — [MGS MOLA MEG016 topography](https://pds-geosciences.wustl.edu/missions/mgs/megdr.html). The5760×2880 signed big-endian16-bit meter-valued array is shifted180° to align longitudes, resampled and packed into2048×1024 RG16 PNG.
- **USGS Astrogeology; Kris Becker; NASA; Arizona State University; JHUAPL; Carnegie Institution for Science** — [Mercury MESSENGER Global DEM665m v2](https://astrogeology.usgs.gov/search/map/mercury_messenger_global_dem_665m). The23040×11520 signed16-bit GeoTIFF uses its embedded0.5-meter scale. It is stride-sampled, resampled and packed into2048×1024 RG16 PNG. Source authors are cited as requested by the product's use constraints.

NASA imagery/data are used under the [NASA images and media guidelines](https://www.nasa.gov/nasa-brand-center/images-and-media/), separately from the CC BY license on SSS maps. Relief is modestly exaggerated in rendering for a phone display; it is not a measurement tool. Original authorship is not claimed for these source assets.

Uranus's dark inner rings are generated from radii in the [NASA PDS Ring-Moon Systems table](https://pds-rings.seti.org/uranus/uranus_rings_table.html). Their display widths are slightly expanded for readability, and the very faint extended outer dust rings are omitted.

## Milky Way

**ESO/S. Brunier**, [The Milky Way panorama, eso0932a](https://www.eso.org/public/images/eso0932a/). The [4000×2000 publication JPEG](https://cdn.eso.org/images/publicationjpg/eso0932a.jpg) remains bundled unchanged as `milkyway.jpg`. Scene lighting/color effects modify its appearance at runtime.

The [ESO usage policy](https://www.eso.org/public/outreach/copyright/) licenses this image under [CC BY4.0](https://creativecommons.org/licenses/by/4.0/) and permits electronic-game use with the full credit visible. The complete credit is included in the menu/packaged Credits panel. No source logo or endorsement is used.

## Reproduction and limits

`node docs/acquire-planet-maps.mjs` and `docs/derive-planet-relief.py` reproduce version0.4's downloads and numeric conversions. The earlier `scripts/fetch-assets.mjs` reproduces the base0.2 atlas; running it alone will revert upgraded files and the manifest, so follow it with the0.4 acquisition/conversion when regenerating the complete atlas.

The19 planetary/layer/sky images total **37,693,869 bytes (35.95MiB)**. Large original scientific data files remain in `.asset-source/planets-v4/` and must not enter the APK. Source/output SHA-256 values and all exact dimensions are in the manifest. The16-bit packed elevation channels were verified numerically against the normalized data with error below1/32767. No screenshots or pixel captures of the game were taken.

From version 0.6, the spacecraft is the user-supplied SE-3 Salvage Tug, including its embedded textures and authored idle animation; provenance and adaptations are in [SPACECRAFT-SE3.md](SPACECRAFT-SE3.md). Station, plasma shader, lighting integration and interface artwork are original project work. From version 0.5, navigation uses physical planet radii and kilometre distances, with an illustrative alignment and fictional FTL propulsion. Solar Wake is independent and does not imply endorsement by NASA, USGS, GEBCO, ESO or other credited creators.


Stellardrone — Light Years (2013)
Music composed and produced by Stellardrone (Edgaras Žakevičius).
Released by Energostatic Records, 22 June 2013.
https://stellardrone.bandcamp.com/album/light-years
Creative Commons Attribution 4.0 International (CC BY 4.0):
https://creativecommons.org/licenses/by/4.0/
Artist's album page licence checked 13 September 2026.

Included: Cepheid, Ultra Deep Field, Messier 45;
Light Years and Red Giant for occasional reveal/approach excerpts.
Adaptations: AAC-LC stereo 160 kbit/s / 44.1 kHz mobile copies,
loudness measurement, fixed attenuation, gentle compression without makeup gain,
runtime excerpt selection, crossfades and narration ducking.
Eternity is excluded. The artist does not endorse Solar Wake.


Website uses Cepheid only, beginning at the game's 48-second cue. No engine or ambient sound effects are played by the website.

Fonts: Montserrat and Space Grotesk, SIL Open Font License 1.1; license files accompany the fonts. Three.js: MIT License. Draco decoder: Apache License 2.0.