This model is based on glTF smaple asset TextureEncodingTest.

Changes from the original:

• Fifth column added 8-bit PNG files with an sRGB chunk.
• Sixth column added 16-bit PNG files with no metadata chunks.
• Seventh column added 16-bit PNG files with custom gAMA and cHRM chunks.
• Eighth column added 16-bit PNG files with custom iCCP chunk.
• Ninth column added 16-bit PNG files with an sRGB chunk.