Material instances with switches uses large amount of memory

-In our code the base flatten material contains a lot of material switches.-

-Another person here found that if an instance material has switches, then shader code is generated for it at cook time and with a lot of proxy meshes that is a lot of extra data.-

-They found that if you have a common instance material with the switches and instance off that, then you can save a huge amount of mem (I saw a 600+MB saving alone).-

-i.e.-

-this is current:-

-base material (with switches)->instance material (with switches, textures set and params)-

-but change to:-

-base material (with switches)>instance material (with switches)>instance material (this is used on the mesh and has textures set and params)-

-And this will save a HUGE amount.-

-So a collection of instance materials with switches, perhaps like a cache of them would be great too.-