I read in this QA that NPOT will take memory as much as next POT sized texture. It means it doesn't give any benefit than POT texture with proper management. (maybe even worse because NPOT should be slower!)
Is this true? Does NPOT texture take and waste same memory like POT texture? I am considering NPOT texture for post-processing, so if it doesn't give memory space benefit, using of NPOT texture is meaningless to me.
Maybe answer can be different for each platforms. I am targeting mobile devices. Such as iPhone or Androids. Does NPOT texture takes same amount of memory on mobile GPUs?