# NASA moon texture assets
All files are downloaded originals or losslessly extracted images from NASA-provided glTF files. No synthetic surface details added.

- io-0.png: NASA VTAD visualization texture extracted from https://assets.science.nasa.gov/content/dam/science/psd/solar/2023/09/i/Io_1_3643.glb . Page https://science.nasa.gov/resource/io-3d-model/ . 4096x2048 global rectangular color texture; approximate/visualization color, calibration and gap treatment undocumented on page.
- titan-0.png: NASA VTAD visualization atmospheric haze texture extracted from https://assets.science.nasa.gov/content/dam/science/psd/solar/2023/09/t/Titan_1_5150.glb . Page https://science.nasa.gov/resource/titan-3d-model/ . 4096x2048. Golden atmosphere, NOT a surface map; color calibration undocumented.
- europa.jpg: https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/image/jupiter---europa/Jupiter%20-%20Europa.jpg . Page https://science.nasa.gov/3d-resources/jupiter-europa/ . 1440x720 grayscale global texture; NASA credits USGS, JPL, Caltech and describes Voyager imagery mosaics. Variable-resolution coverage, smoothed regions.
- ganymede.jpg: https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/image/jupiter---ganymede/Jupiter%20-%20Ganymede.jpg . Page https://science.nasa.gov/3d-resources/jupiter-ganymede/ . Same provenance as above; 1440x720 grayscale.
- callisto.jpg: https://assets.science.nasa.gov/content/dam/science/cds/3d/resources/image/jupiter---callisto/Jupiter%20-%20Callisto.jpg . Page https://science.nasa.gov/3d-resources/jupiter-callisto/ . Same provenance as above; 1440x720 grayscale.
- triton.jpg: https://d2pn8kiwq2w21t.cloudfront.net/original_images/jpegPIA18668.jpg . Page https://www.jpl.nasa.gov/images/pia18668-map-of-triton/ . NASA/JPL-Caltech/Lunar & Planetary Institute, Paul Schenk, Voyager 2. 14138x7069 global rectangular map; enhanced colors close to natural, orange/green/blue filters. LARGE BLACK NO-DATA NORTH REGION, must preserve/label missing coverage rather than invent. Published 2014, 600m/pixel.
- enceladus.jpg: https://d2pn8kiwq2w21t.cloudfront.net/original_images/jpegPIA08417.jpg . Page https://www.jpl.nasa.gov/images/pia08417-map-of-enceladus/ . NASA/JPL/Space Science Institute. Cassini mosaic with Voyager gap fill, grayscale. Simple cylindrical, 440m/pixel. HAS MARGINAL TITLE/COORDINATES: crop to map interior before texture use. Original 3793x2002, interior approximately x=100..3700, y=100..1900 (confirm exact pixels).
- moon-height.tif: https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004720/ldem_4_uint.tif . Page https://svs.gsfc.nasa.gov/4720 . NASA Scientific Visualization Studio, Ernie Wright; LRO LOLA global cylindrical 1440x720 uint16 height. Vertical units half meters relative radius 1727400m: physical altitude relative 1737400m = raw*0.5 - 10000 meters. This is measured topography, not albedo-derived bump.
- moon-height.jpg: https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004720/ldem_3_8bit.jpg . 1024x512 8-bit preview of LOLA displacement; prefer TIFF for quantitative height.

Potential additional files europa-color.png, ganymede-color.png, callisto-color.png: lossless images extracted from NASA VTAD models at https://science.nasa.gov/resource/NAME-3d-model/ . Source GLBs under https://assets.science.nasa.gov/content/dam/science/psd/solar/2023/09/ : e/Europa_1_3138.glb, g/Ganymede_1_5268.glb, c/Callisto_1_4821.glb . Visualization color, exact calibration/gap handling not documented.

- enceladus-vtad.png: NASA VTAD model texture, extracted losslessly. Model page https://science.nasa.gov/resource/enceladus-3d-model/ ; GLB source https://assets.science.nasa.gov/content/dam/science/psd/solar/2023/09/e/Enceladus_1_504.glb . Exact color calibration and gap treatment undocumented.

- triton-vtad.png: NASA VTAD model texture, extracted losslessly. Model page https://science.nasa.gov/resource/triton-3d-model/ ; GLB source https://assets.science.nasa.gov/content/dam/science/psd/solar/2023/09/t/Triton_1_2707.glb . Exact color calibration and gap treatment undocumented.