I have noticed that thro downloading a certain asset, I have found the objects that I am using have Materials and Textures. But when I looked closer at the textures file, there is so many kind of Textures, but there is always 3 words that is always the same on each every Texture. That is(for example) “TX_Gems_01a_ALB”, “TX_Gems_01a_NRM” and “TX_Gems_01a_RMA”. So my question is this, what does the ALB, NRM and RMA mean? And what are they used for?
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ALB = Albedo ( the basic color )
RMA = Roughness, Metallic, Ambient occlusion
NRM = Normal map
RMA is a special type of texture, where the 3 color channels are used to store three different textures, because each of them is only, in fact, black and white.
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Aaah okay, make sense, thank you 
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