roughness-prefilter(1)

filament material tools

Section 1 libfilament-tools bookworm source

Description

ROUGHNESS-PREFILTER

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: