EQInterface Forums - View Single Post

I did some research and it looks like all TGA files are compressed in the D3DFMT_DXT3 format. That format has 4-bits per pixel alpha channel. Each 4x4 block of pixels, or texel as its called has two 16-bit (R5G6B5) colors associated with it. For each of the 16 pixels in a texel they have two bits which represent the linear interpolation of between the two colors. So it leaves artifacts if you have three or more different colors in a texel.

The advantage of DDS files is EQ does not change the format from the way they are stored in the file. So you can pick just about any uncompressed color-bit combination you can imagine, or you can pick any of the 5 DXT compressed formats.

And if anyone is wondering EQ uses A4R4G4B4 for text.

09-07-2008, 06:49 PM	#5
Stoplaughin A Tundra Mammoth Join Date: Mar 2004 Posts: 60	I did some research and it looks like all TGA files are compressed in the D3DFMT_DXT3 format. That format has 4-bits per pixel alpha channel. Each 4x4 block of pixels, or texel as its called has two 16-bit (R5G6B5) colors associated with it. For each of the 16 pixels in a texel they have two bits which represent the linear interpolation of between the two colors. So it leaves artifacts if you have three or more different colors in a texel. The advantage of DDS files is EQ does not change the format from the way they are stored in the file. So you can pick just about any uncompressed color-bit combination you can imagine, or you can pick any of the 5 DXT compressed formats. And if anyone is wondering EQ uses A4R4G4B4 for text.