How do I make dds texture look like this?

[shaaratmook]

Hello im new into modding and im trying to create a weapon for a certain game but i found out that theres a trick to make the dds texture of the model more optimize for the game thats what im trying to accomplish but first how im gonna do that I mean to make the texture look like this one.

https://cdn.discordapp.com/attachments/1...xample.dds