Cemu the Wii U emulator has been updated to 1.3.0 the changes/additions in this version:
Added support for GPU7 geometry shaders
Improved support for 2D texture arrays and cubemaps
Generally improved shader emulation
New debug option: Dump textures and shade
The interesting addition seems to be dumping textures, could this mean in future cemu could even support texture replacement.
Source and Download: http://cemu.info