Quote fromJava would choke on this, as it has memory limits. It'd have to be C# or (more likely) C++, although I'd prefer C# since it would be easier to port to other platforms.
That is an odd statement, as the textures and geometry of the scenes are stored in high performance video memory. All that is stored in your RAM is a reference to the texture, which is a tiny 4 byte integer.
In short: This would not change the amount of RAM Minecraft uses.