doc: update readme

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Azgaar 2023-02-09 13:12:37 -08:00 committed by GitHub
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To get heightmap with correct height scale:
1. Open tangrams.github.io
1. Open https://tangrams.github.io/heightmapper
2. Toggle off auto-exposure
3. Set max elevation to 2000
4. Set min elevation to -500
5. Find region you like
6. Render image
7. Optionally rescale image to a smaller size (e.g. 500x300px) as high resolution is not used
7. Optionally rescale image to a smaller size (e.g. 500x300px) as high resolution is not used