This texture uses ETOPO1 data from "http://www.ngdc.noaa.gov/mgg/global/global.html:
 http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO1/data/bedrock/grid_registered/georeferenced_tiff/
 and Global ocean & land terrain models 2020 (GEBCO_2020 Grid - Data GeoTiff):
 https://www.gebco.net/data_and_products/gridded_bathymetry_data/
 in the alpha channel, and parts of world.topo.bathy.200407.3x4996x2048.png in the rgb channels
 and 'Cross Blended Hypso with Shaded Relief, Water, and Drainages' from "http://www.naturalearthdata.com/downloads/10m-raster-data/10m-cross-blend-hypso/"
 See 00README.txt in the same folder for information about the image usage policy of world.topo.bathy.200407.3x4996x2048.png

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 Data from Natural Earth is in Public Domain.

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 How to Cite ETOPO1:
 Amante, C. and B. W. Eakins, ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis.
 NOAA Technical Memorandum NESDIS NGDC-24, 19 pp, March 2009.

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 notice with such work(s) identifying the U.S. Government material incorporated
 and stating that such material is not subject to copyright protection within the United States.
 The information on government web pages is in the public domain and not subject
 to copyright protection within the United States unless specifically annotated
 otherwise (copyright may be held elsewhere). Foreign copyrights may apply.
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