Fixing command line help text related to mipmap filtering & sRGB.
diff --git a/basisu_tool.cpp b/basisu_tool.cpp
index 813d08b..fdca902 100644
--- a/basisu_tool.cpp
+++ b/basisu_tool.cpp
@@ -110,13 +110,14 @@
"Mipmap generation options:\n"
" -mipmap: Generate mipmaps for each source image\n"
" -mip_srgb: Convert image to linear before filtering, then back to sRGB\n"
- " -mip_linear: Keep image in linear light during mipmap filtering\n"
+ " -mip_linear: Keep image in linear light during mipmap filtering (i.e. do not convert to/from sRGB for filtering purposes)\n"
" -mip_scale X: Set mipmap filter kernel's scale, lower=sharper, higher=more blurry, default is 1.0\n"
" -mip_filter X: Set mipmap filter kernel, default is kaiser, filters: box, tent, bell, blackman, catmullrom, mitchell, etc.\n"
" -mip_renorm: Renormalize normal map to unit length vectors after filtering\n"
" -mip_clamp: Use clamp addressing on borders, instead of wrapping\n"
" -mip_smallest X: Set smallest pixel dimension for generated mipmaps, default is 1 pixel\n"
- "By default, mipmap filtering will occur in sRGB space (for the RGB color channels) unless -linear is specified. You can override this behavior with -mip_srgb/-mip_linear.\n"
+ "By default, textures will be converted from sRGB to linear light before mipmap filtering, then back to sRGB (for the RGB color channels) unless -linear is specified.\n"
+ "You can override this behavior with -mip_srgb/-mip_linear.\n"
"\n"
"Backend endpoint/selector RDO codec options:\n"
" -no_selector_rdo: Disable backend's selector rate distortion optimizations (slightly faster, less noisy output, but lower quality per output bit)\n"
