WEBE — HD PLANETARY TEXTURE CREDITS, SOURCES AND LICENSES
Retrieved and verified: 2026-10-03

These locally served maps are high-resolution WebP derivatives of real planetary
imagery/data published by NASA and Solar System Scope. The lighting, atmosphere,
orbits, satellites, scale and motion are an artistic web visualization rather
than a scientific simulation. No NASA or Solar System Scope endorsement is
presented or implied. No AI-generated geographic texture is used.

planet-earth.webp — 4096 x 2048, WebP quality 88
  NASA Blue Marble: land surface, ocean color and sea ice.
  Credit: NASA/Goddard Space Flight Center, Reto Stockli.
  Original 8192 x 4096; resized down with Lanczos, never upscaled:
  https://eoimages.gsfc.nasa.gov/images/imagerecords/57000/57730/land_ocean_ice_8192.png
  Original record:
  https://visibleearth.nasa.gov/images/57730/the-blue-marble-land-surface-ocean-color-and-sea-ice
  Related Blue Marble data description and credit:
  https://svs.gsfc.nasa.gov/2915/

planet-earth-clouds.webp — 2048 x 1024, WebP quality 90
  The Blue Marble cloud composite, NASA Earth Observatory / Visible Earth.
  Credit: NASA/Goddard Space Flight Center.
  Original 2048 x 1024; native resolution retained:
  https://eoimages.gsfc.nasa.gov/images/imagerecords/57000/57747/cloud_combined_2048.jpg
  Original record:
  https://visibleearth.nasa.gov/images/57747/blue-marble-clouds
  Adaptation: converted to grayscale luminance and encoded as RGB WebP.
  Black represents no cloud, white dense cloud; no baked alpha transparency.
  The cloud composite is historical imagery, not live weather.
  Note: legacy Visible Earth records currently redirect to NASA Earth
  Observatory; the original images remain hosted on NASA's eoimages server.

planet-mars.webp — 2048 x 1024, WebP quality 90
  Mars texture by Solar System Scope / INOVE.
  License: Creative Commons Attribution 4.0 International (CC BY 4.0).
  Publisher and verified licensing statement:
  https://www.solarsystemscope.com/textures/
  Original 8192 x 4096; resized down with Lanczos, never upscaled:
  https://www.solarsystemscope.com/textures/download/8k_mars.jpg
  Changes: resize and RGB WebP conversion. Original publisher's color treatment
  is preserved, without adding generated terrain.

planet-saturn.webp — 2048 x 1024, WebP quality 92
  Saturn texture by Solar System Scope / INOVE.
  License: Creative Commons Attribution 4.0 International (CC BY 4.0).
  Publisher and verified licensing statement:
  https://www.solarsystemscope.com/textures/
  Original 4096 x 2048; resized down with Lanczos, never upscaled:
  https://www.solarsystemscope.com/textures/download/8k_saturn.jpg
  The publisher's filename says "8k", but the decoded original is 4096 x 2048;
  the dimensions above describe the actual file.
  Changes: resize and RGB WebP conversion. Original publisher's color treatment
  is preserved, without adding generated bands or detail.

SOLAR SYSTEM SCOPE / INOVE ATTRIBUTION AND LICENSE
  Mars and Saturn maps: Solar System Scope / INOVE, licensed CC BY 4.0.
  https://www.solarsystemscope.com/textures/
  https://creativecommons.org/licenses/by/4.0/
  The publisher explicitly states: "You may use, adapt, and share these textures
  for any purpose, even commercially." The pack is based on NASA elevation and
  imagery data, with colors tuned against spacecraft/Hubble true-color images.
  The publisher also notes that unmapped gaps in some maps in the pack are
  filled with matching fictional terrain and colors are somewhat more saturated.
  These textures are credited processed planetary maps, not raw photographs or
  a claim of scientific accuracy. No additional fictional geography was added
  during Webe's WebP conversion.

planet-moon.webp — 1024 x 512, WebP quality 89
  CGI Moon Kit lunar surface map, based on Lunar Reconnaissance Orbiter data.
  Credit: NASA's Scientific Visualization Studio.
  Publication and credits: https://svs.gsfc.nasa.gov/4720/
  Original 2048 x 1024; resized down with Lanczos, never upscaled:
  https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004720/lroc_color_2k.jpg
  Changes: resize and RGB WebP conversion.
  The application may reuse this lunar map on stylized small orbital bodies;
  those bodies do not claim to depict other moons scientifically.

NASA USE AND RIGHTS
  NASA's media guidelines state that imagery and media used in 3D models,
  including texture maps, generally are not subject to copyright in the United
  States. They permit Internet web pages and factual use without implied
  endorsement. The commercial-use section says imagery must not explicitly or
  implicitly convey NASA's endorsement of commercial goods or services.
  These NASA maps contain no identifiable people, NASA insignia or third-party
  copyright notices. NASA is acknowledged as the source above.
  https://www.nasa.gov/nasa-brand-center/images-and-media/

REBUILD
  python3 scripts/build_planet_textures.py
  Requires Pillow. Full-size downloads stay in a temporary URL-keyed cache.
  The builder refuses to upscale originals smaller than the requested output.
  All delivered maps are equirectangular 2:1 with power-of-two dimensions for
  GPU mipmaps. The website loads these local assets without contacting sources.