NAME

       roughness-prefilter - filament material tools

DESCRIPTION

       roughness-prefilter  generates  pre-filtered  roughness  maps  from  normal  maps  to help
       mitigate specular aliasing.  Usage:

              roughness-prefilter [options] <normal-map> <output-roughness-map>

   Output note:
              One file will be generated per mip-level. The size of the first level will  be  the
              greater of the input normal map and input roughness map.

   Supported input formats:
              PNG, 8 and 16 bits Radiance (.hdr) Photoshop (.psd), 16 and 32 bits OpenEXR (.exr)

OPTIONS

       --help, -h

              print this message

       --license

              Print copyright and license information

       --roughness=[0..1], -r [0..1]

              desired constant roughness, ignored if --roughness-map is specified

       --roughness-map=<input-roughness-map>, -m <input-roughness-map>

              input roughness map

       --format=[exr|hdr|psd|png|dds|ktx], -f [exr|hdr|psd|png|dds|ktx]

              specify output file format, inferred from file name if omitted

       --compression=COMPRESSION, -c COMPRESSION

              format specific compression:

              PNG: Ignored Radiance: Ignored Photoshop: 16 (default), 32 OpenEXR: RAW, RLE, ZIPS,
              ZIP, PIZ (default) DDS: 8, 16 (default), 32

       --linear, -l

              force linear output when the PNG format is selected

       to help mitigate specular aliasing.  Usage:

              roughness-prefilter [options] <normal-map> <output-roughness-map>

   Output note:
              One file will be generated per mip-level. The size of the first level will  be  the
              greater of the input normal map and input roughness map.

   Supported input formats:
              PNG, 8 and 16 bits Radiance (.hdr) Photoshop (.psd), 16 and 32 bits OpenEXR (.exr)

       --help, -h

              print this message

       --license

              Print copyright and license information

       --roughness=[0..1], -r [0..1]

              desired constant roughness, ignored if --roughness-map is specified

       --roughness-map=<input-roughness-map>, -m <input-roughness-map>

              input roughness map

       --format=[exr|hdr|psd|png|dds|ktx], -f [exr|hdr|psd|png|dds|ktx]

              specify output file format, inferred from file name if omitted

       --compression=COMPRESSION, -c COMPRESSION

              format specific compression:

              PNG: Ignored Radiance: Ignored Photoshop: 16 (default), 32 OpenEXR: RAW, RLE, ZIPS,
              ZIP, PIZ (default) DDS: 8, 16 (default), 32

       --linear, -l

              force linear output when the PNG format is selected

roughness-prefilter generates pre-filtered Octobers2021ps from normal maps ROUGHNESS-PREFILTER(1)