v1.6.0

Added

• BCFormat.BC1A format for explicit DXT1/BC1 punch-through alpha encoding.

Changed

• BCFormat.BC1 is now strictly opaque and disables accidental BC1 3-color alpha artifacts on dark blocks.
• resize_to_pot and pot_dimensions now resize to the nearest power-of-two instead of always rounding up.
• DDS serialization now routes through the native writer to avoid duplicate Python/native header drift.

Fixed

• Fixed DXT3/BC2 DDS loading, rejected truncated DDS payloads, and validated RSC physical offsets.