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Dynamic mipmap creation?

Hi!
I am creating some textures at start up right now which will not be edited later on during gameplay.
This is working fine with some help from https://wiki.unrealengine.com/Dynamic_Textures

But my issue is now how to create more mip levels? When I create the texture it only starts with one miplevel.
I tryied to simply just adding one in the texture->PlatformData->Mips array, but that ofcourse ended with a crash.
Any help on how to create mipmaps for a dynamic texture or either getting it auto generated would be greatly appreciated!

Thank you!