Whether a texture is a colour map or a data map (§60a, §77; R-30c,
2026-09-09).
"color" is albedo, emissive, and anything authored in an image editor;
"data" is a normal, roughness, occlusion, or mask map whose bytes are the
numbers they are. The tag is optional: omitting it invents no default role,
and leaves TextureSource.colorSpace at its dated "linear" default
so every already-authored texture stays byte-identical. See
TextureSource.role.
Whether a texture is a colour map or a data map (§60a, §77; R-30c, 2026-09-09).
"color"is albedo, emissive, and anything authored in an image editor;"data"is a normal, roughness, occlusion, or mask map whose bytes are the numbers they are. The tag is optional: omitting it invents no default role, and leaves TextureSource.colorSpace at its dated"linear"default so every already-authored texture stays byte-identical. See TextureSource.role.