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skymodelr: Generates and Samples Realistic Terrestrial Atmospheres

Generates physically based sky environment maps and radiance samples using the spectral Hosek-Wilkie and Prague atmosphere models. Functions write high-dynamic-range 'OpenEXR' domes in latitude-longitude projections, compute per-direction RGB or 55-channel values, and optionally composite time-accurate star fields and moon phases. Features include automatic sun and moon positioning from date, time and location, support for sea-level and high-altitude observers, wide-spectrum coefficients, and multithreaded C++ acceleration for fast, high-resolution output. For model details, see Hosek and Wilkie (2012) <doi:10.1145/2185520.2185591>, Hosek and Wilkie (2013) <doi:10.1109/MCG.2013.18>, Wilkie et al. (2021) <doi:10.1145/3450626.3459758>, and Vevoda et al. (2022) <doi:10.1111/cgf.14677>.

Version: 0.3.1
Depends: R (≥ 4.3.0)
Imports: Rcpp, swephR, rayvertex (≥ 0.14.0), rayimage (≥ 0.24.1)
LinkingTo: Rcpp, RcppThread, libimath, libopenexr
Suggests: testthat (≥ 3.0.0), rayrender (≥ 0.40.1)
Published: 2026-06-26
DOI: 10.32614/CRAN.package.skymodelr (may not be active yet)
Author: Tyler Morgan-Wall [aut, cre, cph], Petr Vevoda [ctb], Charles University [cph], Eric Bruneton [ctb, cph], Lukas Hosek [ctb, cph], Alexander Wilkie [ctb, cph]
Maintainer: Tyler Morgan-Wall <tylermw at gmail.com>
BugReports: https://github.com/tylermorganwall/skymodelr/issues
License: GPL-3
Copyright: file inst/COPYRIGHTS
skymodelr copyright details
URL: https://www.skymodelr.com
NeedsCompilation: yes
Materials: NEWS
CRAN checks: skymodelr results

Documentation:

Reference manual: skymodelr.html , skymodelr.pdf

Downloads:

Package source: skymodelr_0.3.1.tar.gz
Windows binaries: r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries: r-release (arm64): not available, r-oldrel (arm64): not available, r-release (x86_64): not available, r-oldrel (x86_64): not available

Linking:

Please use the canonical form https://CRAN.R-project.org/package=skymodelr to link to this page.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.