Difference between revisions of "DDS Files"

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25 bytes added ,  12:46, 19 January 2012
imported>Ethatron
m (little correction)
imported>Ethatron
 
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|Loading Screens
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NOTES: Compression for the RGB channels does not differ between DXT1, 3, and 5.  The differences lie in the manner in which the alpha channel is compressed.  DXT1 compresses the alpha map as all-white, which is highly compressible.  DXT1 has a two-bit alpha channel, either white ("Implicit") or black (the color-channels are set to 0).  DXT3 has a larger grayscale available ("Explicit"), and DXT5 has as wide an alpha map grayscale as it has for the color channels ("Interpolated").
NOTES: Compression for the RGB channels does not differ significantly between DXT1, 3, and 5.  The main differences lie in the manner in which the alpha channel is compressed.  DXT1 compresses the alpha map as all-black/white, which is highly compressible.  DXT1 has a two-bit alpha channel, either white ("Implicit") or black (the color-channels are set to 0).  DXT3 has a larger grayscale available ("Explicit"), and DXT5 has as wide an alpha map grayscale as it has for the color channels ("Interpolated").


Because of this, saving a Normal map as DXT1 has the unwanted side effect of causing full specular highlighting over the whole mesh to which the texture is assigned to.  DXT3 or DXT5 are strongly recommended for normal maps.
Because of this, saving a Normal map as DXT1 has the unwanted side effect of causing full specular highlighting over the whole mesh to which the texture is assigned to.  DXT3 or DXT5 are strongly recommended for normal maps.
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