Saturday, September 18, 2004

More on FNTC

Lately we found out that our compression ratios were computed comparing FNTC24 with uncompressed 24bit textures - which sounds pretty logical. Since modern hardware doesn't support 24bit texture formats, our ratios increase by almost a third.
All uncompressed 24bit textures are "promoted" to 32bit by the card's driver...and take 32bit/pixel in video memory as well, instead of 24bits.
The only 24bit format supported is actually DXTC - which remains 24bits in memory.

So, our 2.5:1 ratio for maximum quality, becomes 3.5:1 in real life. And this is true for all our declared ratios.

...it might be time for a web-update! ;)


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