While trying to find a memory fault in the Texture system of skyline, i built a helpful utility that even you can use from within skyline which shows all the textures that are in the texture system.
This tool shows all the loaded textures on the video ram and also all the textures that are not.
Size calculations per Texture source type.
texture source types are whether textures are in the scene on materials, compositor textures, shadow textures, depth buffers or master batch textures which are the 2D texture arrays which the standard/ scene textures use as seen in the image by piecing the parent texture to the bottom tree widget.
It also shows how much space is wasted and you can find out where it is, which means you will know which texture arrays are being used correctly and which ones are just hogging space but not being used which can be detrimental in optimizing game performance, loads times etc... as texture arrays are quick as if textures are shared in the same master texture then the shaders dont have to bind a different texture improving performance. So the higher the average efficiency, the less memory you will use and better performance you will get.
This means trying to make textures the same width, height, depth, num mipmaps, formats etc...
This editor will help you find where the problems are.
See this pic for a demo: (It shows more information to the right, but wont fit on forum post.)