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3Dc
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'''3Dc''' ([[FourCC]] : ATI2), also known as '''DXN''', '''BC5''', or '''Block Compression 5''' is a [[lossy data compression]] algorithm for [[normal mapping|normal maps]] invented and first implemented by [[ATI Technologies|ATI]]. It builds upon the earlier [[DXT5]] algorithm and is an [[open standard]]. 3Dc is now implemented by both ATI and [[Nvidia]].
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